DRUG INTERACTIONS SECTION.

7. DRUG INTERACTIONS CYP2D6 enzyme inhibitors may increase nebivolol levels. (7.1) Reserpine or clonidine may produce excessive reduction of sympathetic activity. (7.2) Both digitalis glycosides and -blockers slow atrioventricular conduction and decrease heart rate. Concomitant use can increase the risk of bradycardia. (7.3) Verapamil- or diltiazem-type calcium channel blockers may cause excessive reductions in heart rate, blood pressure, and cardiac contractility. (7.4). CYP2D6 enzyme inhibitors may increase nebivolol levels. (7.1) Reserpine or clonidine may produce excessive reduction of sympathetic activity. (7.2) Both digitalis glycosides and -blockers slow atrioventricular conduction and decrease heart rate. Concomitant use can increase the risk of bradycardia. (7.3) Verapamil- or diltiazem-type calcium channel blockers may cause excessive reductions in heart rate, blood pressure, and cardiac contractility. (7.4). 7.1 CYP2D6 Inhibitors Use caution when BYSTOLIC is co-administered with CYP2D6 inhibitors (quinidine, propafenone, fluoxetine, paroxetine, etc.) [see Clinical Pharmacology 12.5 )].. 7.2 Hypotensive Agents Do not use BYSTOLIC with other -blockers. Closely monitor patients receiving catecholamine-depleting drugs, such as reserpine or guanethidine, because the added -blocking action of BYSTOLIC may produce excessive reduction of sympathetic activity. In patients who are receiving BYSTOLIC and clonidine, discontinue BYSTOLIC for several days before the gradual tapering of clonidine.. 7.3 Digitalis Glycosides Both digitalis glycosides and -blockers slow atrioventricular conduction and decrease heart rate. Concomitant use can increase the risk of bradycardia.. 7.4 Calcium Channel Blockers BYSTOLIC can exacerbate the effects of myocardial depressants or inhibitors of AV conduction, such as certain calcium antagonists (particularly of the phenylalkylamine [verapamil] and benzothiazepine [diltiazem] classes), or antiarrhythmic agents, such as disopyramide.

ADVERSE REACTIONS SECTION.

6. ADVERSE REACTIONS . Most common adverse reactions (6.1):Headache, fatigueTo report SUSPECTED ADVERSE REACTIONS, Contact Allergan at 1-800-678-1605 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.. Headache, fatigue. 6.1 Clinical Studies Experience BYSTOLIC has been evaluated for safety in patients with hypertension and in patients with heart failure. The observed adverse reaction profile was consistent with the pharmacology of the drug and the health status of the patients in the clinical trials. Adverse reactions reported for each of these patient populations are provided below. Excluded are adverse reactions considered too general to be informative and those not reasonably associated with the use of the drug because they were associated with the condition being treated or are very common in the treated population. The data described below reflect worldwide clinical trial exposure to BYSTOLIC in 6545 patients, including 5038 patients treated for hypertension and the remaining 1507 subjects treated for other cardiovascular diseases. Doses ranged from 0.5 mg to 40 mg. Patients received BYSTOLIC for up to 24 months, with over 1900 patients treated for at least months, and approximately 1300 patients for more than one year. HYPERTENSION: In placebo-controlled clinical trials comparing BYSTOLIC with placebo, discontinuation of therapy due to adverse reactions was reported in 2.8% of patients treated with nebivolol and 2.2% of patients given placebo. The most common adverse reactions that led to discontinuation of BYSTOLIC were headache (0.4%), nausea (0.2%) and bradycardia (0.2%).Table lists treatment-emergent adverse reactions that were reported in three 12-week, placebo-controlled monotherapy trials involving 1597 hypertensive patients treated with either mg, 10 mg, or 20-40 mg of BYSTOLIC and 205 patients given placebo and for which the rate of occurrence was at least 1% of patients treated with nebivolol and greater than the rate for those treated with placebo in at least one dose group. Table 1. Treatment-Emergent Adverse Reactions with an Incidence (over weeks) >= 1% in BYSTOLIC-Treated Patients and at Higher Frequency than Placebo-Treated Patients System Organ Class Preferred TermPlacebo (n 205)(%)Nebivolol5 mg(n 459)(%)Nebivolol10 mg(n 461)(%)Nebivolol20-40 mg(n 677)(%)Cardiac Disorders Bradycardia0001Gastrointestinal Disorders Diarrhea2223 Nausea0132General Disorders Fatigue 1225 Chest pain0011 Peripheral edema0111Nervous System Disorders Headache6967 Dizziness2234Psychiatric Disorders Insomnia0111Respiratory Disorders Dyspnea0011Skin and subcutaneous Tissue Disorders Rash0011Listed below are other reported adverse reactions with an incidence of at least 1% in the more than 4300 patients treated with BYSTOLIC in controlled or open-label trials except for those already appearing in Table 1, terms too general to be informative, minor symptoms, or adverse reactions unlikely to be attributable to drug because they are common in the population. These adverse reactions were in most cases observed at similar frequency in placebo-treated patients in the controlled studies.Body as Whole: asthenia.Gastrointestinal System Disorders: abdominal pain Metabolic and Nutritional Disorders: hypercholesterolemiaNervous System Disorders: paraesthesia. 6.2 Laboratory Abnormalities In controlled monotherapy trials of hypertensive patients, BYSTOLIC was associated with an increase in BUN, uric acid, triglycerides and decrease in HDL cholesterol and platelet count. 6.3 Postmarketing Experience The following adverse reactions have been identified from spontaneous reports of BYSTOLIC received worldwide and have not been listed elsewhere. These adverse reactions have been chosen for inclusion due to combination of seriousness, frequency of reporting or potential causal connection to BYSTOLIC. Adverse reactions common in the population have generally been omitted. Because these adverse reactions were reported voluntarily from population of uncertain size, it is not possible to estimate their frequency or establish causal relationship to BYSTOLIC exposure: abnormal hepatic function (including increased AST, ALT and bilirubin), acute pulmonary edema, acute renal failure, atrioventricular block (both second and third degree), bronchospasm, erectile dysfunction, hypersensitivity (including urticaria, allergic vasculitis and rare reports of angioedema), hypotension, myocardial infarction, pruritus, psoriasis, Raynauds phenomenon, peripheral ischemia/claudication, somnolence, syncope, thrombocytopenia, various rashes and skin disorders, vertigo, and vomiting.

DOSAGE & ADMINISTRATION SECTION.

2. DOSAGE AND ADMINISTRATION Can be taken with and without food. Individualize to the needs of the patient and monitor during up-titration. (2)Hypertension: Most patients start at mg once daily. Dose can be increased at 2-week intervals up to 40 mg. (2.1). Hypertension: Most patients start at mg once daily. Dose can be increased at 2-week intervals up to 40 mg. (2.1). 2.1 Hypertension The dose of BYSTOLIC must be individualized to the needs of the patient. For most patients, the recommended starting dose is mg once daily, with or without food, as monotherapy or in combination with other agents. For patients requiring further reduction in blood pressure, the dose can be increased at 2-week intervals up to 40 mg. more frequent dosing regimen is unlikely to be beneficial.Renal Impairment In patients with severe renal impairment (ClCr less than 30 mL/min) the recommended initial dose is 2.5 mg once daily; titrate up slowly if needed. BYSTOLIC has not been studied in patients receiving dialysis [see Clinical Pharmacology 12.4 ]. Hepatic Impairment In patients with moderate hepatic impairment, the recommended initial dose is 2.5 mg once daily; titrate up slowly if needed. BYSTOLIC has not been studied in patients with severe hepatic impairment and therefore it is not recommended in that population [see Clinical Pharmacology 12.4 ]. 2.2 Subpopulations Geriatric PatientsIt is not necessary to adjust the dose in the elderly [see use in Specific Populations 8.5 )] CYP2D6 Polymorphism No dose adjustments are necessary for patients who are CYP2D6 poor metabolizers. The clinical effect and safety profile observed in poor metabolizers were similar to those of extensive metabolizers [see Clinical Pharmacology 12.3 )].

CARCINOGENESIS & MUTAGENESIS & IMPAIRMENT OF FERTILITY SECTION.

13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility In two-year study of nebivolol in mice, statistically significant increase in the incidence of testicular Leydig cell hyperplasia and adenomas was observed at 40 mg/kg/day (5 times the maximally recommended human dose of 40 mg on mg/m2 basis). Similar findings were not reported in mice administered doses equal to approximately 0.3 or 1.2 times the maximum recommended human dose. No evidence of tumorigenic effect was observed in 24-month study in Wistar rats receiving doses of nebivolol 2.5, 10 and 40 mg/kg/day (equivalent to 0.6, 2.4, and 10 times the maximally recommended human dose). Co-administration of dihydrotestosterone reduced blood LH levels and prevented the Leydig cell hyperplasia, consistent with an indirect LH-mediated effect of nebivolol in mice and not thought to be clinically relevant in man. randomized, double-blind, placebo- and active-controlled, parallel-group study in healthy male volunteers was conducted to determine the effects of nebivolol on adrenal function, luteinizing hormone, and testosterone levels. This study demonstrated that weeks of daily dosing with 10 mg of nebivolol had no significant effect on ACTH-stimulated mean serum cortisol AUC0-120 min, serum LH, or serum total testosterone. Effects on spermatogenesis were seen in male rats and mice at >= 40 mg/kg/day (10 and times the MRHD, respectively). For rats the effects on spermatogenesis were not reversed and may have worsened during four week recovery period. The effects of nebivolol on sperm in mice, however, were partially reversible. Mutagenesis: Nebivolol was not genotoxic when tested in battery of assays (Ames, in vitro mouse lymphoma TK+/-, in vitro human peripheral lymphocyte chromosome aberration, in vivo Drosophila melanogaster sex-linked recessive lethal, and in vivo mouse bone marrow micronucleus tests).

CLINICAL PHARMACOLOGY SECTION.

12. CLINICAL PHARMACOLOGY Nebivolol is -adrenergic receptor blocking agent. In extensive metabolizers (most of the population) and at doses less than or equal to 10 mg, nebivolol is preferentially selective. In poor metabolizers and at higher doses, nebivolol inhibits both - and - adrenergic receptors. Nebivolol lacks intrinsic sympathomimetic and membrane stabilizing activity at therapeutically relevant concentrations. At clinically relevant doses, BYSTOLIC does not demonstrate 1-adrenergic receptor blockade activity. Various metabolites, including glucuronides, contribute to -blocking activity. 12.1 Mechanism of Action The mechanism of action of the antihypertensive response of BYSTOLIC has not been definitively established. Possible factors that may be involved include: (1) decreased heart rate, (2) decreased myocardial contractility, (3) diminution of tonic sympathetic outflow to the periphery from cerebral vasomotor centers, (4) suppression of renin activity and (5) vasodilation and decreased peripheral vascular resistance. 12.3 Pharmacokinetics Nebivolol is metabolized by number of routes, including glucuronidation and hydroxylation by CYP2D6. The active isomer (d-nebivolol) has an effective half-life of about 12 hours in CYP2D6 extensive metabolizers (most people), and 19 hours in poor metabolizers and exposure to d-nebivolol is substantially increased in poor metabolizers. This has less importance than usual, however, because the metabolites, including the hydroxyl metabolite and glucuronides (the predominant circulating metabolites), contribute to -blocking activity.Plasma levels of d-nebivolol increase in proportion to dose in EMs and PMs for doses up to 20mg. Exposure to l-nebivolol is higher than to d-nebivolol but l-nebivolol contributes little to the drugs activity as d-nebivolols beta receptor affinity is 1000-fold higher than l-nebivolol. For the same dose, PMs attain 5-fold higher Cmax and 10-fold higher AUC of d-nebivolol than do EMs. d-Nebivolol accumulates about 1.5-fold with repeated once-daily dosing in EMs.AbsorptionAbsorption of BYSTOLIC is similar to an oral solution. The absolute bioavailability has not been determined. Mean peak plasma nebivolol concentrations occur approximately 1.5 to hours post-dosing in EMs and PMs. Food does not alter the pharmacokinetics of nebivolol. Under fed conditions, nebivolol glucuronides are slightly reduced. BYSTOLIC may be administered without regard to meals.DistributionThe in vitro human plasma protein binding of nebivolol is approximately 98%, mostly to albumin, and is independent of nebivolol concentrations. MetabolismNebivolol is predominantly metabolized via direct glucuronidation of parent and to lesser extent via N-dealkylation and oxidation via cytochrome P450 2D6. Its stereospecific metabolites contribute to the pharmacologic activity [see Drug Interactions 7 )]. EliminationAfter single oral administration of 14C-nebivolol, 38% of the dose was recovered in urine and 44% in feces for EMs and 67% in urine and 13% in feces for PMs. Essentially all nebivolol was excreted as multiple oxidative metabolites or their corresponding glucuronide conjugates. 12.4 Pharmacokinetics in Special Populations Hepatic Diseased-Nebivolol peak plasma concentration increased 3-fold, exposure (AUC) increased 10-fold, and the apparent clearance decreased by 86% in patients with moderate hepatic impairment (Child-Pugh Class B). No formal studies have been performed in patients with severe hepatic impairment and nebivolol should be contraindicated for these patients [see Dosage and Administration 2.1 )].Renal DiseaseThe apparent clearance of nebivolol was unchanged following single mg dose of BYSTOLIC in patients with mild renal impairment (ClCr 50 to 80 mL/min, n=7), and it was reduced negligibly in patients with moderate (ClCr 30 to 50 mL/min, n=9), but clearance was reduced by 53% in patients with severe renal impairment (ClCr <30 mL/min, n=5). No studies have been conducted in patients on dialysis [see Dosage and Administration 2.1 )] . 12.5 Drug-Drug Interactions Drugs that inhibit CYP2D6 can be expected to increase plasma levels of nebivolol. When BYSTOLIC is co-administered with an inhibitor or an inducer of this enzyme, monitor patients closely and adjust the nebivolol dose according to blood pressure response. In vitro studies have demonstrated that at therapeutically relevant concentrations, d- and l-nebivolol do not inhibit any cytochrome P450 pathways. Digoxin: Concomitant administration of BYSTOLIC (10 mg once daily) and digoxin (0.25 mg once daily) for 10 days in 14 healthy adult individuals resulted in no significant changes in the pharmacokinetics of digoxin or nebivolol [see Drug Interactions (7)].Warfarin: Administration of BYSTOLIC (10 mg once daily for 10 days) led to no significant changes in the pharmacokinetics of nebivolol or R- or S-warfarin following single 10 mg dose of warfarin. Similarly, nebivolol has no significant effects on the anticoagulant activity of warfarin, as assessed by Prothrombin time and INR profiles from to 144 hours after single 10 mg warfarin dose in 12 healthy adult volunteers.Diuretics: No pharmacokinetic interactions were observed in healthy adults between nebivolol (10 mg daily for 10 days) and furosemide (40 mg single dose), hydrochlorothiazide (25 mg once daily for 10 days), or spironolactone (25 mg once daily for 10 days).Ramipril: Concomitant administration of BYSTOLIC (10 mg once daily) and ramipril (5 mg once daily) for 10 days in 15 healthy adult volunteers produced no pharmacokinetic interactions.Losartan: Concomitant administration of BYSTOLIC (10 mg single dose) and losartan (50 mg single dose) in 20 healthy adult volunteers did not result in pharmacokinetic interactions.Fluoxetine: Fluoxetine, CYP2D6 inhibitor, administered at 20 mg per day for 21 days prior to single 10 mg dose of nebivolol to 10 healthy adults, led to an 8-fold increase in the AUC and 3-fold increase in Cmax for d-nebivolol [see Drug Interactions 7 )] Histamine-2 Receptor Antagonists: The pharmacokinetics of nebivolol (5 mg single dose) were not affected by the co-administration of ranitidine (150 mg twice daily). Cimetidine (400 mg twice daily) causes 23% increase in the plasma levels of d-nebivolol.Charcoal: The pharmacokinetics of nebivolol (10 mg single dose) were not affected by repeated co-administration (4, 8, 12, 16, 22, 28, 36, and 48 hours after nebivolol administration) of activated charcoal (Actidose(R)-Aqua).Sildenafil: The co-administration of nebivolol and sildenafil decreased AUC and Cmax of sildenafil by 21 and 23% respectively. The effect on the Cmax and AUC for d-nebivolol was also small (< 20%). The effect on vital signs (e.g., pulse and blood pressure) was approximately the sum of the effects of sildenafil and nebivolol. Other Concomitant Medications: Utilizing population pharmacokinetic analyses, derived from hypertensive patients, the following drugs were observed not to have an effect on the pharmacokinetics of nebivolol: acetaminophen, acetylsalicylic acid, atorvastatin, esomeprazole, ibuprofen, levothyroxine sodium, metformin, sildenafil, simvastatin, or tocopherol.Protein Binding: No meaningful changes in the extent of in vitro binding of nebivolol to human plasma proteins were noted in the presence of high concentrations of diazepam, digoxin, diphenylhydantoin, enalapril, hydrochlorothiazide, imipramine, indomethacin, propranolol, sulfamethazine, tolbutamide, or warfarin. Additionally, nebivolol did not significantly alter the protein binding of the following drugs: diazepam, digoxin, diphenylhydantoin, hydrochlorothiazide, imipramine, or warfarin at their therapeutic concentrations.

CLINICAL STUDIES SECTION.

6.1 Clinical Studies Experience BYSTOLIC has been evaluated for safety in patients with hypertension and in patients with heart failure. The observed adverse reaction profile was consistent with the pharmacology of the drug and the health status of the patients in the clinical trials. Adverse reactions reported for each of these patient populations are provided below. Excluded are adverse reactions considered too general to be informative and those not reasonably associated with the use of the drug because they were associated with the condition being treated or are very common in the treated population. The data described below reflect worldwide clinical trial exposure to BYSTOLIC in 6545 patients, including 5038 patients treated for hypertension and the remaining 1507 subjects treated for other cardiovascular diseases. Doses ranged from 0.5 mg to 40 mg. Patients received BYSTOLIC for up to 24 months, with over 1900 patients treated for at least months, and approximately 1300 patients for more than one year. HYPERTENSION: In placebo-controlled clinical trials comparing BYSTOLIC with placebo, discontinuation of therapy due to adverse reactions was reported in 2.8% of patients treated with nebivolol and 2.2% of patients given placebo. The most common adverse reactions that led to discontinuation of BYSTOLIC were headache (0.4%), nausea (0.2%) and bradycardia (0.2%).Table lists treatment-emergent adverse reactions that were reported in three 12-week, placebo-controlled monotherapy trials involving 1597 hypertensive patients treated with either mg, 10 mg, or 20-40 mg of BYSTOLIC and 205 patients given placebo and for which the rate of occurrence was at least 1% of patients treated with nebivolol and greater than the rate for those treated with placebo in at least one dose group. Table 1. Treatment-Emergent Adverse Reactions with an Incidence (over weeks) >= 1% in BYSTOLIC-Treated Patients and at Higher Frequency than Placebo-Treated Patients System Organ Class Preferred TermPlacebo (n 205)(%)Nebivolol5 mg(n 459)(%)Nebivolol10 mg(n 461)(%)Nebivolol20-40 mg(n 677)(%)Cardiac Disorders Bradycardia0001Gastrointestinal Disorders Diarrhea2223 Nausea0132General Disorders Fatigue 1225 Chest pain0011 Peripheral edema0111Nervous System Disorders Headache6967 Dizziness2234Psychiatric Disorders Insomnia0111Respiratory Disorders Dyspnea0011Skin and subcutaneous Tissue Disorders Rash0011Listed below are other reported adverse reactions with an incidence of at least 1% in the more than 4300 patients treated with BYSTOLIC in controlled or open-label trials except for those already appearing in Table 1, terms too general to be informative, minor symptoms, or adverse reactions unlikely to be attributable to drug because they are common in the population. These adverse reactions were in most cases observed at similar frequency in placebo-treated patients in the controlled studies.Body as Whole: asthenia.Gastrointestinal System Disorders: abdominal pain Metabolic and Nutritional Disorders: hypercholesterolemiaNervous System Disorders: paraesthesia.

INDICATIONS & USAGE SECTION.

1. INDICATIONS AND USAGE BYSTOLIC is beta-adrenergic blocking agent indicated for the treatment of hypertension, to lower blood pressure. Lowering blood pressure reduces the risk of fatal and nonfatal cardiovascular events, primarily strokes and myocardial infarctions. (1.1). 1.1 Hypertension. BYSTOLIC is indicated for the treatment of hypertension, to lower blood pressure [see Clinical Studies 14.1 )]. BYSTOLIC may be used alone or in combination with other antihypertensive agents [see Drug Interactions 7 )]. Lowering blood pressure reduces the risk of fatal and nonfatal cardiovascular events, primarily strokes and myocardial infarctions. These benefits have been seen in controlled trials of antihypertensive drugs from wide variety of pharmacologic classes, including the class to which this drug principally belongs. There are no controlled trials demonstrating risk reduction with BYSTOLIC. Control of high blood pressure should be part of comprehensive cardiovascular risk management, including, as appropriate, lipid control, diabetes management, antithrombotic therapy, smoking cessation, exercise, and limited sodium intake. Many patients will require more than one drug to achieve blood pressure goals. For specific advice on goals and management, see published guidelines, such as those of the National High Blood Pressure Education Programs Joint National Committee on Prevention, Detection, Evaluation, and Treatment of High Blood Pressure (JNC). Numerous antihypertensive drugs, from variety of pharmacologic classes and with different mechanisms of action, have been shown in randomized controlled trials to reduce cardiovascular morbidity and mortality, and it can be concluded that it is blood pressure reduction, and not some other pharmacologic property of the drugs, that is largely responsible for those benefits. The largest and most consistent cardiovascular outcome benefit has been reduction in the risk of stroke, but reductions in myocardial infarction and cardiovascular mortality also have been seen regularly. Elevated systolic or diastolic pressure causes increased cardiovascular risk, and the absolute risk increase per mmHg is greater at higher blood pressures, so that even modest reductions of severe hypertension can provide substantial benefit. Relative risk reduction from blood pressure reduction is similar across populations with varying absolute risk, so the absolute benefit is greater in patients who are at higher risk independent of their hypertension (for example, patients with diabetes or hyperlipidemia), and such patients would be expected to benefit from more aggressive treatment to lower blood pressure goal. Some antihypertensive drugs have smaller blood pressure effects (as monotherapy) in black patients, and many antihypertensive drugs have additional approved indications and effects (e.g., on angina, heart failure, or diabetic kidney disease). These considerations may guide selection of therapy.

NONCLINICAL TOXICOLOGY SECTION.

13. NONCLINICAL TOXICOLOGY . 13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility In two-year study of nebivolol in mice, statistically significant increase in the incidence of testicular Leydig cell hyperplasia and adenomas was observed at 40 mg/kg/day (5 times the maximally recommended human dose of 40 mg on mg/m2 basis). Similar findings were not reported in mice administered doses equal to approximately 0.3 or 1.2 times the maximum recommended human dose. No evidence of tumorigenic effect was observed in 24-month study in Wistar rats receiving doses of nebivolol 2.5, 10 and 40 mg/kg/day (equivalent to 0.6, 2.4, and 10 times the maximally recommended human dose). Co-administration of dihydrotestosterone reduced blood LH levels and prevented the Leydig cell hyperplasia, consistent with an indirect LH-mediated effect of nebivolol in mice and not thought to be clinically relevant in man. randomized, double-blind, placebo- and active-controlled, parallel-group study in healthy male volunteers was conducted to determine the effects of nebivolol on adrenal function, luteinizing hormone, and testosterone levels. This study demonstrated that weeks of daily dosing with 10 mg of nebivolol had no significant effect on ACTH-stimulated mean serum cortisol AUC0-120 min, serum LH, or serum total testosterone. Effects on spermatogenesis were seen in male rats and mice at >= 40 mg/kg/day (10 and times the MRHD, respectively). For rats the effects on spermatogenesis were not reversed and may have worsened during four week recovery period. The effects of nebivolol on sperm in mice, however, were partially reversible. Mutagenesis: Nebivolol was not genotoxic when tested in battery of assays (Ames, in vitro mouse lymphoma TK+/-, in vitro human peripheral lymphocyte chromosome aberration, in vivo Drosophila melanogaster sex-linked recessive lethal, and in vivo mouse bone marrow micronucleus tests).

OVERDOSAGE SECTION.

10. OVERDOSAGE In clinical trials and worldwide postmarketing experience there were reports of BYSTOLIC overdose. The most common signs and symptoms associated with BYSTOLIC overdosage are bradycardia and hypotension. Other important adverse reactions reported with BYSTOLIC overdose include cardiac failure, dizziness, hypoglycemia, fatigue and vomiting. Other adverse reactions associated with -blocker overdose include bronchospasm and heart block.The largest known ingestion of BYSTOLIC worldwide involved patient who ingested up to 500 mg of BYSTOLIC along with several 100 mg tablets of acetylsalicylic acid in suicide attempt. The patient experienced hyperhydrosis, pallor, depressed level of consciousness, hypokinesia, hypotension, sinus bradycardia, hypoglycemia, hypokalemia, respiratory failure and vomiting. The patient recovered.Because of extensive drug binding to plasma proteins, hemodialysis is not expected to enhance nebivolol clearance.If overdose occurs, provide general supportive and specific symptomatic treatment. Based on expected pharmacologic actions and recommendations for other -blockers, consider the following general measures, including stopping BYSTOLIC, when clinically warranted:Bradycardia: Administer IV atropine. If the response is inadequate, isoproterenol or another agent with positive chronotropic properties may be given cautiously. Under some circumstances, transthoracic or transvenous pacemaker placement may be necessary.Hypotension: Administer IV fluids and vasopressors. Intravenous glucagon may be useful.Heart Block (second or third degree): Monitor and treat with isoproterenol infusion. Under some circumstances, transthoracic or transvenous pacemaker placement may be necessary.Congestive Heart Failure: Initiate therapy with digitalis glycoside and diuretics. In certain cases, consider the use of inotropic and vasodilating agents. Bronchospasm: Administer bronchodilator therapy such as short acting inhaled 2-agonist and/or aminophylline.Hypoglycemia: Administer IV glucose. Repeated doses of IV glucose or possibly glucagon may be required.Supportive measures should continue until clinical stability is achieved. The half-life of low doses of nebivolol is 12-19 hours.Call the National Poison Control Center (800-222-1222) for the most current information on -blocker overdose treatment.

PHARMACOKINETICS SECTION.

12.3 Pharmacokinetics Nebivolol is metabolized by number of routes, including glucuronidation and hydroxylation by CYP2D6. The active isomer (d-nebivolol) has an effective half-life of about 12 hours in CYP2D6 extensive metabolizers (most people), and 19 hours in poor metabolizers and exposure to d-nebivolol is substantially increased in poor metabolizers. This has less importance than usual, however, because the metabolites, including the hydroxyl metabolite and glucuronides (the predominant circulating metabolites), contribute to -blocking activity.Plasma levels of d-nebivolol increase in proportion to dose in EMs and PMs for doses up to 20mg. Exposure to l-nebivolol is higher than to d-nebivolol but l-nebivolol contributes little to the drugs activity as d-nebivolols beta receptor affinity is 1000-fold higher than l-nebivolol. For the same dose, PMs attain 5-fold higher Cmax and 10-fold higher AUC of d-nebivolol than do EMs. d-Nebivolol accumulates about 1.5-fold with repeated once-daily dosing in EMs.AbsorptionAbsorption of BYSTOLIC is similar to an oral solution. The absolute bioavailability has not been determined. Mean peak plasma nebivolol concentrations occur approximately 1.5 to hours post-dosing in EMs and PMs. Food does not alter the pharmacokinetics of nebivolol. Under fed conditions, nebivolol glucuronides are slightly reduced. BYSTOLIC may be administered without regard to meals.DistributionThe in vitro human plasma protein binding of nebivolol is approximately 98%, mostly to albumin, and is independent of nebivolol concentrations. MetabolismNebivolol is predominantly metabolized via direct glucuronidation of parent and to lesser extent via N-dealkylation and oxidation via cytochrome P450 2D6. Its stereospecific metabolites contribute to the pharmacologic activity [see Drug Interactions 7 )]. EliminationAfter single oral administration of 14C-nebivolol, 38% of the dose was recovered in urine and 44% in feces for EMs and 67% in urine and 13% in feces for PMs. Essentially all nebivolol was excreted as multiple oxidative metabolites or their corresponding glucuronide conjugates.

PREGNANCY SECTION.

8.1 Pregnancy Risk SummaryAvailable data regarding use of BYSTOLIC in pregnant women are insufficient to determine whether there are drug-associated risks of adverse developmental outcomes. There are risks to the mother and fetus associated with poorly controlled hypertension in pregnancy. The use of beta blockers during the third trimester of pregnancy may increase the risk of hypotension, bradycardia, hypoglycemia, and respiratory depression in the neonate [see Clinical Considerations]. Oral administration of nebivolol to pregnant rats during organogenesis resulted in embryofetal and perinatal lethality at doses approximately equivalent to the maximum recommended human dose (MRHD). The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2-4% and 15-20%, respectively.Clinical ConsiderationsDisease-associated maternal and/or embryo/fetal riskHypertension in pregnancy increases the maternal risk for pre-eclampsia, gestational diabetes, premature delivery, and delivery complications (e.g., need for cesarean section, and post-partum hemorrhage). Hypertension increases the fetal risk for intrauterine growth restriction and intrauterine death. Pregnant women with hypertension should be carefully monitored and managed accordingly.Fetal/Neonatal adverse reactionsNeonates of women with hypertension, who are treated with beta-blockers during the third trimester of pregnancy, may be at increased risk for hypotension, bradycardia, hypoglycemia, and respiratory depression. Observe newborns for symptoms of hypotension, bradycardia, hypoglycemia and respiratory depression and manage accordingly. DataAnimal DataNebivolol was shown to increase embryo-fetal and perinatal lethality in rats at approximately 1.2 times the MRHD or 40 mg/day on mg/m2 basis. Decreased pup body weights occurred at 1.25 and 2.5 mg/kg in rats, when exposed during the perinatal period (late gestation, parturition and lactation). At mg/kg and higher doses (1.2 times the MRHD), prolonged gestation, dystocia and reduced maternal care were produced with corresponding increases in late fetal deaths and stillbirths and decreased birth weight, live litter size and pup survival. These events occurred only when nebivolol was given during the perinatal period (late gestation, parturition and lactation). Insufficient numbers of pups survived at mg/kg to evaluate the offspring for reproductive performance.In studies in which pregnant rats were given nebivolol during organogenesis, reduced fetal body weights were observed at maternally toxic doses of 20 and 40 mg/kg/day (5 and 10 times the MRHD), and small reversible delays in sternal and thoracic ossification associated with the reduced fetal body weights and small increase in resorption occurred at 40 mg/kg/day (10 times the MRHD).No adverse effects on embryo-fetal viability, sex, weight or morphology were observed in studies in which nebivolol was given to pregnant rabbits at doses as high as 20 mg/kg/day (10 times the MRHD).

SPL PATIENT PACKAGE INSERT SECTION.

PATIENT INFORMATIONBYSTOLIC(R) (bi-STOL-ik) (nebivolol) TabletsRead the Patient Information that comes with BYSTOLIC before you start taking it and each time you get refill. There may be new information. This information does not take the place of talking with your doctor about your medical condition or your treatment. If you have any questions about BYSTOLIC, ask your doctor or pharmacist. WHAT IS BYSTOLIC BYSTOLIC is kind of prescription medicine called beta-blocker. BYSTOLIC treats:High blood pressure (hypertension) BYSTOLIC can lower blood pressure when used by itself and with other medicines. BYSTOLIC is not approved for children less than 18 years of age. WHO SHOULD NOT TAKE BYSTOLIC Do not take BYSTOLIC if you: Have heart failure and are in the ICU or need medicines to keep up your blood circulation Have slow heartbeat or your heart skips beats (irregular heartbeat) Have severe liver damage Are allergic to any ingredient in BYSTOLIC. The active ingredient is nebivolol. See the end of this leaflet for list of ingredients.WHAT SHOULD TELL MY DOCTOR BEFORE TAKING BYSTOLIC Tell your doctor about all of your medical problems, including if you: Have asthma or other lung problems (such as bronchitis or emphysema) Have problems with blood flow in your feet and legs (peripheral vascular disease) BYSTOLIC can make symptoms of blood flow problems worse. Have diabetes and take medicine to control blood sugar Have thyroid problems Have liver or kidney problems Had allergic reactions to medications or have allergies Have condition called pheochromocytoma Are pregnant or trying to become pregnant. It is not known if BYSTOLIC is safe for your unborn baby. Talk with your doctor about the best way to treat high blood pressure while you are pregnant. Are breastfeeding. It is not known if BYSTOLIC passes into your breast milk. You should not breastfeed while using BYSTOLIC. Are scheduled for surgery and will be given anesthetic agents Tell your doctor about all the medicines you take. Include prescription and non-prescription medicines, vitamins, and herbal products. BYSTOLIC and certain other medicines can affect each other and cause serious side effects. Keep list of all the medicines you take. Show this list to your doctor and pharmacist before you start new medicine. HOW SHOULD TAKE BYSTOLIC Do not suddenly stop taking BYSTOLIC. You could have chest pain or heart attack. If your doctor decides to stop BYSTOLIC, your doctor may slowly lower your dose over time before stopping it completely. Take BYSTOLIC every day exactly as your doctor tells you. Your doctor will tell you how much BYSTOLIC to take and how often. Your doctor may start with low dose and raise it over time. Do not stop taking BYSTOLIC or change your dose without talking with your doctor. Take BYSTOLIC with or without food. If you miss dose, take your dose as soon as you remember, unless it is close to the time to take your next dose. Do not take doses at the same time. Take your next dose at the usual time. If you take too much BYSTOLIC, call your doctor or poison control center right away. WHAT ARE POSSIBLE SIDE EFFECTS OF BYSTOLIC Low blood pressure and feeling dizzy. If you feel dizzy, sit or lie down and tell your doctor right away. Tiredness Slow heartbeat Headache Leg swelling due to fluid retention (edema). Tell your doctor if you gain weight or have trouble breathing while taking BYSTOLIC. Tell your doctor if you have any side effects that bother you or dont go away. HOW SHOULD STORE BYSTOLIC Store BYSTOLIC between 68 to 77F (20 25C). Safely throw away BYSTOLIC that is out of date or no longer needed. Keep BYSTOLIC and all medicines out of the reach of children. GENERAL INFORMATION ABOUT BYSTOLIC Doctors sometimes prescribe medicines for conditions not included in the patient information leaflets. Only use BYSTOLIC for the medical problem it was prescribed for. Do not give BYSTOLIC to other people, even if they have the same symptoms. It may harm them. This leaflet summarizes the most important information about BYSTOLIC. For more information:Talk with your doctor. Ask your doctor or pharmacist for information about BYSTOLIC that is written for healthcare professionals. Visit www.BYSTOLIC.com on the web or call 1-800-678-1605. WHAT IS IN BYSTOLIC Active Ingredient: NebivololInactive Ingredients: colloidal silicon dioxide, croscarmellose sodium, D&C Red 27 Lake, FD&C Blue Lake, FD&C Yellow Lake, hypromellose, lactose monohydrate, magnesium stearate, microcrystalline cellulose, pregelatinized starch, polysorbate 80, and sodium lauryl sulfateWHAT IS HIGH BLOOD PRESSURE (HYPERTENSION)Blood pressure is the force in your blood vessels when your heart beats and when your heart rests. You have high blood pressure when the force is too great.High blood pressure makes the heart work harder to pump blood through the body and causes damage to the blood vessels. BYSTOLIC tablets can help your blood vessels relax so your blood pressure is lower.Medicines that lower your blood pressure lower your chance of having stroke or heart attack.Rev. June 2019Distributed by:Allergan USA, Inc.Madison, NJ 07940 Licensed from Mylan Laboratories, Inc.Actidose(R)-Aqua is registered trademark of Paddock Laboratories, LLCBYSTOLIC(R) is registered trademark of Allergan Sales, LLC.Patented. See www.allergan.com/patents(C) 2019 Allergan. All rights reserved.V2.1PPI1402. High blood pressure (hypertension) Have heart failure and are in the ICU or need medicines to keep up your blood circulation Have slow heartbeat or your heart skips beats (irregular heartbeat) Have severe liver damage Are allergic to any ingredient in BYSTOLIC. The active ingredient is nebivolol. See the end of this leaflet for list of ingredients.. Have asthma or other lung problems (such as bronchitis or emphysema) Have problems with blood flow in your feet and legs (peripheral vascular disease) BYSTOLIC can make symptoms of blood flow problems worse. Have diabetes and take medicine to control blood sugar Have thyroid problems Have liver or kidney problems Had allergic reactions to medications or have allergies Have condition called pheochromocytoma Are pregnant or trying to become pregnant. It is not known if BYSTOLIC is safe for your unborn baby. Talk with your doctor about the best way to treat high blood pressure while you are pregnant. Are breastfeeding. It is not known if BYSTOLIC passes into your breast milk. You should not breastfeed while using BYSTOLIC. Are scheduled for surgery and will be given anesthetic agents Do not suddenly stop taking BYSTOLIC. You could have chest pain or heart attack. If your doctor decides to stop BYSTOLIC, your doctor may slowly lower your dose over time before stopping it completely. Take BYSTOLIC every day exactly as your doctor tells you. Your doctor will tell you how much BYSTOLIC to take and how often. Your doctor may start with low dose and raise it over time. Do not stop taking BYSTOLIC or change your dose without talking with your doctor. Take BYSTOLIC with or without food. If you miss dose, take your dose as soon as you remember, unless it is close to the time to take your next dose. Do not take doses at the same time. Take your next dose at the usual time. If you take too much BYSTOLIC, call your doctor or poison control center right away. Low blood pressure and feeling dizzy. If you feel dizzy, sit or lie down and tell your doctor right away. Tiredness Slow heartbeat Headache Leg swelling due to fluid retention (edema). Tell your doctor if you gain weight or have trouble breathing while taking BYSTOLIC. Store BYSTOLIC between 68 to 77F (20 25C). Safely throw away BYSTOLIC that is out of date or no longer needed. Keep BYSTOLIC and all medicines out of the reach of children. Only use BYSTOLIC for the medical problem it was prescribed for. Do not give BYSTOLIC to other people, even if they have the same symptoms. It may harm them. Talk with your doctor. Ask your doctor or pharmacist for information about BYSTOLIC that is written for healthcare professionals. Visit www.BYSTOLIC.com on the web or call 1-800-678-1605.

SPL UNCLASSIFIED SECTION.

1.1 Hypertension. BYSTOLIC is indicated for the treatment of hypertension, to lower blood pressure [see Clinical Studies 14.1 )]. BYSTOLIC may be used alone or in combination with other antihypertensive agents [see Drug Interactions 7 )]. Lowering blood pressure reduces the risk of fatal and nonfatal cardiovascular events, primarily strokes and myocardial infarctions. These benefits have been seen in controlled trials of antihypertensive drugs from wide variety of pharmacologic classes, including the class to which this drug principally belongs. There are no controlled trials demonstrating risk reduction with BYSTOLIC. Control of high blood pressure should be part of comprehensive cardiovascular risk management, including, as appropriate, lipid control, diabetes management, antithrombotic therapy, smoking cessation, exercise, and limited sodium intake. Many patients will require more than one drug to achieve blood pressure goals. For specific advice on goals and management, see published guidelines, such as those of the National High Blood Pressure Education Programs Joint National Committee on Prevention, Detection, Evaluation, and Treatment of High Blood Pressure (JNC). Numerous antihypertensive drugs, from variety of pharmacologic classes and with different mechanisms of action, have been shown in randomized controlled trials to reduce cardiovascular morbidity and mortality, and it can be concluded that it is blood pressure reduction, and not some other pharmacologic property of the drugs, that is largely responsible for those benefits. The largest and most consistent cardiovascular outcome benefit has been reduction in the risk of stroke, but reductions in myocardial infarction and cardiovascular mortality also have been seen regularly. Elevated systolic or diastolic pressure causes increased cardiovascular risk, and the absolute risk increase per mmHg is greater at higher blood pressures, so that even modest reductions of severe hypertension can provide substantial benefit. Relative risk reduction from blood pressure reduction is similar across populations with varying absolute risk, so the absolute benefit is greater in patients who are at higher risk independent of their hypertension (for example, patients with diabetes or hyperlipidemia), and such patients would be expected to benefit from more aggressive treatment to lower blood pressure goal. Some antihypertensive drugs have smaller blood pressure effects (as monotherapy) in black patients, and many antihypertensive drugs have additional approved indications and effects (e.g., on angina, heart failure, or diabetic kidney disease). These considerations may guide selection of therapy.

USE IN SPECIFIC POPULATIONS SECTION.

8. USE IN SPECIFIC POPULATIONS Lactation: Breastfeeding is not recommended. (8.2). Lactation: Breastfeeding is not recommended. (8.2). 8.1 Pregnancy Risk SummaryAvailable data regarding use of BYSTOLIC in pregnant women are insufficient to determine whether there are drug-associated risks of adverse developmental outcomes. There are risks to the mother and fetus associated with poorly controlled hypertension in pregnancy. The use of beta blockers during the third trimester of pregnancy may increase the risk of hypotension, bradycardia, hypoglycemia, and respiratory depression in the neonate [see Clinical Considerations]. Oral administration of nebivolol to pregnant rats during organogenesis resulted in embryofetal and perinatal lethality at doses approximately equivalent to the maximum recommended human dose (MRHD). The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2-4% and 15-20%, respectively.Clinical ConsiderationsDisease-associated maternal and/or embryo/fetal riskHypertension in pregnancy increases the maternal risk for pre-eclampsia, gestational diabetes, premature delivery, and delivery complications (e.g., need for cesarean section, and post-partum hemorrhage). Hypertension increases the fetal risk for intrauterine growth restriction and intrauterine death. Pregnant women with hypertension should be carefully monitored and managed accordingly.Fetal/Neonatal adverse reactionsNeonates of women with hypertension, who are treated with beta-blockers during the third trimester of pregnancy, may be at increased risk for hypotension, bradycardia, hypoglycemia, and respiratory depression. Observe newborns for symptoms of hypotension, bradycardia, hypoglycemia and respiratory depression and manage accordingly. DataAnimal DataNebivolol was shown to increase embryo-fetal and perinatal lethality in rats at approximately 1.2 times the MRHD or 40 mg/day on mg/m2 basis. Decreased pup body weights occurred at 1.25 and 2.5 mg/kg in rats, when exposed during the perinatal period (late gestation, parturition and lactation). At mg/kg and higher doses (1.2 times the MRHD), prolonged gestation, dystocia and reduced maternal care were produced with corresponding increases in late fetal deaths and stillbirths and decreased birth weight, live litter size and pup survival. These events occurred only when nebivolol was given during the perinatal period (late gestation, parturition and lactation). Insufficient numbers of pups survived at mg/kg to evaluate the offspring for reproductive performance.In studies in which pregnant rats were given nebivolol during organogenesis, reduced fetal body weights were observed at maternally toxic doses of 20 and 40 mg/kg/day (5 and 10 times the MRHD), and small reversible delays in sternal and thoracic ossification associated with the reduced fetal body weights and small increase in resorption occurred at 40 mg/kg/day (10 times the MRHD).No adverse effects on embryo-fetal viability, sex, weight or morphology were observed in studies in which nebivolol was given to pregnant rabbits at doses as high as 20 mg/kg/day (10 times the MRHD).. 8.2 Lactation. Risk SummaryThere is no information regarding the presence of nebivolol in human milk, the effects on the breastfed infant, or the effects on milk production. Nebivolol is present in rat milk [see Data]. Because of the potential for -blockers to produce serious adverse reactions in nursing infants, especially bradycardia, BYSTOLIC is not recommended during nursing.DataIn lactating rats, maximum milk levels of unchanged nebivolol were observed at hours after single and repeat doses of 2.5 mg/kg/day. The daily dose (mg/kg body weight) ingested by rat pup is 0.3% of the dam dose for unchanged nebivolol.. 8.4 Pediatric Use Safety and effectiveness in pediatric patients have not been established. Pediatric studies in ages newborn to 18 years old have not been conducted because of incomplete characterization of developmental toxicity and possible adverse effects on long-term fertility [see Nonclinical Toxicology 13.1 )].Juvenile Animal Toxicity DataDaily oral doses of nebivolol to juvenile rats from post-natal day 14 to post-natal day 27 showed sudden unexplained death at exposures equal to those in human poor metabolizers given single dose of 10 mg. No mortality was seen at half the adult human exposure.In surviving rats, cardiomyopathy was seen at exposures greater than or equal to the human exposure. Male rat pups exposed to twice the human exposure showed decreases in total sperm count as well as decreases in the total and percentage of motile sperm.. 8.5 Geriatric Use Of the 2800 patients in the U.S. sponsored placebo-controlled clinical hypertension studies, 478 patients were 65 years of age or older. No overall differences in efficacy or in the incidence of adverse events were observed between older and younger patients. 8.6 Heart Failure In placebo-controlled trial of 2128 patients (1067 BYSTOLIC, 1061 placebo) over 70 years of age with chronic heart failure receiving maximum dose of 10 mg per day for median of 20 months, no worsening of heart failure was reported with nebivolol compared to placebo. However, if heart failure worsens consider discontinuation of BYSTOLIC.

WARNINGS AND PRECAUTIONS SECTION.

5. WARNINGS AND PRECAUTIONS Acute exacerbation of coronary artery disease upon cessation of therapy: Do not abruptly discontinue. (5.1) Diabetes: Monitor glucose as -blockers may mask symptoms of hypoglycemia. (5.5). Acute exacerbation of coronary artery disease upon cessation of therapy: Do not abruptly discontinue. (5.1) Diabetes: Monitor glucose as -blockers may mask symptoms of hypoglycemia. (5.5). 5.1 Abrupt Cessation of Therapy Do not abruptly discontinue BYSTOLIC therapy in patients with coronary artery disease. Severe exacerbation of angina, myocardial infarction and ventricular arrhythmias have been reported in patients with coronary artery disease following the abrupt discontinuation of therapy with -blockers. Myocardial infarction and ventricular arrhythmias may occur with or without preceding exacerbation of the angina pectoris. Caution patients without overt coronary artery disease against interruption or abrupt discontinuation of therapy. As with other -blockers, when discontinuation of BYSTOLIC is planned, carefully observe and advise patients to minimize physical activity. Taper BYSTOLIC over to weeks when possible. If the angina worsens or acute coronary insufficiency develops, re-start BYSTOLIC promptly, at least temporarily. 5.2 Angina and Acute Myocardial Infarction BYSTOLIC was not studied in patients with angina pectoris or who had recent MI. 5.3 Bronchospastic Diseases. In general, patients with bronchospastic diseases should not receive -blockers. 5.4 Anesthesia and Major Surgery. Because beta-blocker withdrawal has been associated with an increased risk of MI and chest pain, patients already on beta-blockers should generally continue treatment throughout the perioperative period. If BYSTOLIC is to be continued perioperatively, monitor patients closely when anesthetic agents which depress myocardial function, such as ether, cyclopropane, and trichloroethylene, are used. If -blocking therapy is withdrawn prior to major surgery, the impaired ability of the heart to respond to reflex adrenergic stimuli may augment the risks of general anesthesia and surgical procedures.The -blocking effects of BYSTOLIC can be reversed by -agonists, e.g., dobutamine or isoproterenol. However, such patients may be subject to protracted severe hypotension. Additionally, difficulty in restarting and maintaining the heartbeat has been reported with -blockers.. 5.5 Diabetes and Hypoglycemia. -blockers may mask some of the manifestations of hypoglycemia, particularly tachycardia. Nonselective -blockers may potentiate insulin-induced hypoglycemia and delay recovery of serum glucose levels. It is not known whether nebivolol has these effects. Advise patients subject to spontaneous hypoglycemia and diabetic patients receiving insulin or oral hypoglycemic agents about these possibilities.. 5.6 Thyrotoxicosis. -blockers may mask clinical signs of hyperthyroidism, such as tachycardia. Abrupt withdrawal of -blockers may be followed by an exacerbation of the symptoms of hyperthyroidism or may precipitate thyroid storm.. 5.7 Peripheral Vascular Disease. -blockers can precipitate or aggravate symptoms of arterial insufficiency in patients with peripheral vascular disease.. 5.8 Non-dihydropyridine Calcium Channel Blockers. Because of significant negative inotropic and chronotropic effects in patients treated with -blockers and calcium channel blockers of the verapamil and diltiazem type, monitor the ECG and blood pressure in patients treated concomitantly with these agents.. 5.9 Use with CYP2D6 Inhibitors. Nebivolol exposure increases with inhibition of CYP2D6 [see Drug Interactions 7 ]. The dose of BYSTOLIC may need to be reduced.. 5.10 Impaired Renal Function Renal clearance of nebivolol is decreased in patients with severe renal impairment. BYSTOLIC has not been studied in patients receiving dialysis [see Clinical Pharmacology 12.4 and Dosage and Administration 2.1 )].. 5.11 Impaired Hepatic Function Metabolism of nebivolol is decreased in patients with moderate hepatic impairment. BYSTOLIC has not been studied in patients with severe hepatic impairment [see Clinical Pharmacology 12.4 and Dosage and Administration 2.1 )]. 5.12 Risk of Anaphylactic Reactions While taking -blockers, patients with history of severe anaphylactic reactions to variety of allergens may be more reactive to repeated accidental, diagnostic, or therapeutic challenge. Such patients may be unresponsive to the usual doses of epinephrine used to treat allergic reactions. 5.13 Pheochromocytoma. In patients with known or suspected pheochromocytoma, initiate an -blocker prior to the use of any -blocker.