OVERDOSAGE SECTION.

10 OVERDOSAGE. Hypotension, QT prolongation, bradycardia, myoclonic activity, severe tremor, unsteady gait/incoordination, dizziness, nausea, vomiting, dysphasia, and hallucinations have been seen in cases of oral overdose of ranolazine. In cases of extreme overdose of ranolazine fatal outcomes have been reported. In clinical studies, high intravenous exposure resulted in diplopia, paresthesia, confusion, and syncope.In addition to general supportive measures, continuous ECG monitoring may be warranted in the event of overdose.Since ranolazine is about 62% bound to plasma proteins, hemodialysis is unlikely to be effective in clearing ranolazine.

PACKAGE LABEL.PRINCIPAL DISPLAY PANEL.

PACKAGE LABEL.PRINCIPAL DISPLAY PANEL. NDC 42571-324-60 Ranolazine Extended-Release Tablets 500 mg Rx only 60 Tablets Micro Labs Limited NDC 42571-325-60 Ranolazine Extended-Release Tablets 1,000 mg Rx only 60 Tablets Micro Labs Limited ranolazine-lbl-a.jpg. ranolazine-lbl-b.jpg.

ADVERSE REACTIONS SECTION.

6 ADVERSE REACTIONS. Most common adverse reactions (>4% and more common than with placebo) are dizziness, headache, constipation, nausea. 6.1) To report SUSPECTED ADVERSE REACTIONS, contact Micro Labs USA, Inc. at 1-855-839-8195 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1Clinical Trial Experience. Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice.A total of 2018 patients with chronic angina were treated with ranolazine in controlled clinical trials. Of the patients treated with ranolazine, 1026 were enrolled in three double- blind, placebo-controlled, randomized studies (CARISA, ERICA, MARISA) of up to 12 weeks duration. In addition, upon study completion, 1251 patients received treatment with ranolazine in open-label, long-term studies; 1227 patients were exposed to ranolazine for more than year, 613 patients for more than years, 531 patients for more than years, and 326 patients for more than years.At recommended doses, about 6% of patients discontinued treatment with ranolazine because of an adverse event in controlled studies in angina patients compared to about 3% on placebo. The most common adverse events that led to discontinuation more frequently on ranolazine than placebo were dizziness (1.3% versus 0.1%), nausea (1% versus 0%), asthenia, constipation, and headache (each about 0.5% versus 0%). Doses above 1000 mg twice daily are poorly tolerated.In controlled clinical trials of angina patients, the most frequently reported treatment- emergent adverse reactions (>4% and more common on ranolazine than on placebo) were dizziness (6.2%), headache (5.5%), constipation (4.5%), and nausea (4.4%). Dizziness may be dose-related. In open-label, long-term treatment studies, similar adverse reaction profile was observed.The following additional adverse reactions occurred at an incidence of 0.5 to 4.0% in patients treated with ranolazine and were more frequent than the incidence observed in placebo-treated patients:Cardiac Disorders bradycardia, palpitations Ear and Labyrinth Disorders tinnitus, vertigo Eye Disorders blurred vision Gastrointestinal Disorders abdominal pain, dry mouth, vomiting, dyspepsia General Disorders and Administrative Site Adverse Events asthenia, peripheral edema Metabolism and Nutrition Disorders anorexia Nervous System Disorders syncope (vasovagal) Psychiatric Disorders confusional state Renal and Urinary Disorders hematuria Respiratory, Thoracic, and Mediastinal Disorders dyspnea Skin and Subcutaneous Tissue Disorders hyperhidrosis Vascular Disorders hypotension, orthostatic hypotension Other (<0.5%) but potentially medically important adverse reactions observed more frequently with ranolazine than placebo treatment in all controlled studies included: angioedema, renal failure, eosinophilia, chromaturia, blood urea increased, hypoesthesia, paresthesia, tremor, pulmonary fibrosis, thrombocytopenia, leukopenia, and pancytopenia.A large clinical trial in acute coronary syndrome patients was unsuccessful in demonstrating benefit for ranolazine, but there was no apparent proarrhythmic effect in these high-risk patients [see Clinical Studies (14.2)] Laboratory Abnormalities:Ranolazine produces elevations of serum creatinine by 0.1 mg/dL, regardless of previous renal function, likely because of inhibition of creatinines tubular secretion. In general, the elevation has rapid onset, shows no signs of progression during long-term therapy, is reversible after discontinuation of ranolazine, and is not accompanied by changes in BUN. In healthy volunteers, ranolazine1000 mg twice daily had no effect upon the glomerular filtration rate. More marked and progressive increases in serum creatinine, associated with increases in BUN or potassium, indicating acute renal failure, have been reported after initiation of ranolazine in patients with severe renal impairment [see Warnings and Precautions (5.2), Use in Specific Populations (8.7)] . 6.2Postmarketing Experience. The following adverse reactions have been identified during postapproval use of ranolazine. Because these reactions are reported voluntarily from population of uncertain size, it is not always possible to reliably estimate their frequency or establish causal relationship to drug exposure:Nervous System Disorders Abnormal coordination, myoclonus, paresthesia, tremor, and other serious neurologic adverse events have been reported to occur, sometimes concurrently, in patients taking ranolazine. The onset of events was often associated with an increase in ranolazine dose or exposure. Many patients reported symptom resolution following drug discontinuation or dose decrease. Metabolism and Nutrition Disorders Cases of hypoglycemia have been reported in diabetic patients on antidiabetic medication. Psychiatric Disorders hallucination Renal and Urinary Disorders dysuria, urinary retention Skin and Subcutaneous Tissue Disorders angioedema, pruritus, rash.

PEDIATRIC USE SECTION.

8.4 Pediatric Use. Safety and effectiveness have not been established in pediatric patients.

CARCINOGENESIS & MUTAGENESIS & IMPAIRMENT OF FERTILITY SECTION.

13.1 Carcinogenesis, Mutagenesis, Impairment Of Fertility. Ranolazine tested negative for genotoxic potential in the following assays: Ames bacterial mutation assay, Saccharomyces assay for mitotic gene conversion, chromosomal aberrations assay in Chinese hamster ovary (CHO) cells, mammalian CHO/HGPRT gene mutation assay, and mouse and rat bone marrow micronucleus assays.There was no evidence of carcinogenic potential in mice or rats. The highest oral doses used in the carcinogenicity studies were 150 mg/kg/day for 21 months in rats (900 mg/m 2/day) and 50 mg/kg/day for 24 months in mice (150 mg/m 2/day). These maximally tolerated doses are 0.8 and 0.1 times, respectively, the daily maximum recommended human dose (MRHD) of 2000 mg on surface area basis. published study reported that ranolazine promoted tumor formation and progression to malignancy when given to transgenic APC (min/+) mice at dose of 30 mg/kg twice daily [see References (15)]. The clinical significance of this finding is unclear. In male and female rats, oral administration of ranolazine that produced exposures (AUC) approximatelty 3-fold or 5-fold higher, respectively, than the MRHD had no effect on fertility.

CLINICAL PHARMACOLOGY SECTION.

12 CLINICAL PHARMACOLOGY. 12.1 Mechanism of Action. The mechanism of action of ranolazines antianginal effects has not been determined. Ranolazine has anti-ischemic and antianginal effects that do not depend upon reductions in heart rate or blood pressure. It does not affect the rate-pressure product, measure of myocardial work, at maximal exercise. Ranolazine at therapeutic levels can inhibit the cardiac late sodium current (I Na). However, the relationship of this inhibition to angina symptoms is uncertain. The QT prolongation effect of ranolazine on the surface electrocardiogram is the result of inhibition of Kr, which prolongs the ventricular action potential. 12.2 Pharmacodynamics. Hemodynamic EffectsPatients with chronic angina treated with ranolazine in controlled clinical studies had minimal changes in mean heart rate (<2 bpm) and systolic blood pressure (<3 mm Hg). Similar results were observed in subgroups of patients with CHF NYHA Class or II, diabetes, or reactive airway disease, and in elderly patients.Electrocardiographic EffectsDose and plasma concentration-related increases in the QTc interval [see Warnings and Precautions (5.1)], reductions in wave amplitude, and, in some cases, notched waves, have been observed in patients treated with ranolazine. These effects are believed to be caused by ranolazine and not by its metabolites. The relationship between the change in QTc and ranolazine plasma concentrations is linear, with slope of about 2.6 msec/1000 ng/mL, through exposures corresponding to doses several-fold higher than the maximum recommended dose of 1000 mg twice daily. The variable blood levels attained after given dose of ranolazine give wide range of effects on QTc. At max following repeat dosing at 1000 mg twice daily, the mean change in QTc is about msec, but in the 5% of the population with the highest plasma concentrations, the prolongation of QTc is at least 15 msec. In cirrhotic subjects with mild or moderate hepatic impairment, the relationship between plasma level of ranolazine and QTc is much steeper [see Contraindications (4)] Age, weight, gender, race, heart rate, congestive heart failure, diabetes, and renal impairment did not alter the slope of the QTc-concentration relationship of ranolazine.No proarrhythmic effects were observed on 7-day Holter recordings in 3162 acute coronary syndrome patients treated with ranolazine. There was significantly lower incidence of arrhythmias (ventricular tachycardia, bradycardia, supraventricular tachycardia, and new atrial fibrillation) in patients treated with ranolazine (80%) versus placebo (87%), including ventricular tachycardia >=3 beats (52% versus 61%). However, this difference in arrhythmias did not lead to reduction in mortality, reduction in arrhythmia hospitalization, or reduction in arrhythmia symptoms.. 12.3 Pharmacokinetics. Ranolazine is extensively metabolized in the gut and liver and its absorption is highly variable. For example, at dose of 1000 mg twice daily, the mean steady-state max was 2600 ng/mL with 95% confidence limits of 400 and 6100 ng/mL. The pharmacokinetics of the (+) R- and (-) S-enantiomers of ranolazine are similar in healthy volunteers. The apparent terminal half-life of ranolazine is hours. Steady state is generally achieved within days of twice-daily dosing with ranolazine. At steady state over the dose range of 500 to 1000 mg twice daily, max and AUC to increase slightly more than proportionally to dose, 2.2- and 2.4-fold, respectively. With twice-daily dosing, the trough: peak ratio of the ranolazine plasma concentration is 0.3 to 0.6. The pharmacokinetics of ranolazine is unaffected by age, gender, or food. Absorption and DistributionAfter oral administration of ranolazine, peak plasma concentrations of ranolazine are reached between and hours. After oral administration of 14C-ranolazine as solution, 73% of the dose is systemically available as ranolazine or metabolites. The bioavailability of ranolazine from ranolazine tablets relative to that from solution of ranolazine is 76%. Because ranolazine is substrate of P-gp, inhibitors of P-gp may increase the absorption of ranolazine. Food (high-fat breakfast) has no important effect on the max and AUC of ranolazine. Therefore, ranolazine may be taken without regard to meals. Over the concentration range of 0.25 to 10 ug/mL, ranolazine is approximately 62% bound to human plasma proteins. Metabolism and ExcretionRanolazine is metabolized mainly by CYP3A and, to lesser extent, by CYP2D6. Following single oral dose of ranolazine solution, approximately 75% of the dose is excreted in urine and 25% in feces. Ranolazine is metabolized rapidly and extensively in the liver and intestine; less than 5% is excreted unchanged in urine and feces. The pharmacologic activity of the metabolites has not been well characterized. After dosing to steady state with 500 mg to 1500 mg twice daily, the four most abundant metabolites in plasma have AUC values ranging from about to 33% that of ranolazine, and display apparent half-lives ranging from to 22 hours.Drug InteractionsEffect of Other Drugs on RanolazineIn vitro data indicate that ranolazine is substrate of CYP3A and, to lesser degree, of CYP2D6. Ranolazine is also substrate of P-glycoprotein.Strong CYP3A InhibitorsPlasma levels of ranolazine with ranolazine 1000 mg twice daily are increased by 220% when co-administered with ketoconazole 200 mg twice daily [see Contraindications (4)]. Moderate CYP3A InhibitorsPlasma levels of ranolazine with ranolazine 1000 mg twice daily are increased by 50 to 130% by diltiazem 180 to 360 mg, respectively. Plasma levels of ranolazine with ranolazine 750 mg twice daily are increased by 100% by verapamil 120 mg three times daily [see Drug Interactions (7.1)]. Weak CYP3A InhibitorsThe weak CYP3A inhibitors simvastatin (20 mg once daily) and cimetidine (400 mg three times daily) do not increase the exposure to ranolazine in healthy volunteers.CYP3A InducersRifampin 600 mg once daily decreases the plasma concentrations of ranolazine (1000 mg twice daily) by approximately 95% [see Contraindications (4)]. CYP2D6 InhibitorsParoxetine 20 mg once daily increased ranolazine concentrations by 20% in healthy volunteers receiving ranolazine 1000 mg twice daily. No dose adjustment of ranolazine is required in patients treated with CYP2D6 inhibitors.DigoxinPlasma concentrations of ranolazine are not significantly altered by concomitant digoxin at 0.125 mg once daily.Effect of Ranolazine on Other DrugsIn vitro ranolazine and its O-demethylated metabolite are weak inhibitors of CYP3A and moderate inhibitors of CYP2D6 and P-gp. In vitro ranolazine is an inhibitor of OCT2.CYP3A SubstratesThe plasma levels of simvastatin, CYP3A substrate, and its active metabolite are increased by 100% in healthy volunteers receiving 80 mg once daily and ranolazine1000 mg twice daily [see Drug Interactions (7.2)] Mean exposure to atorvastatin (80 mg daily) is increased by 40% following co-administration with ranolazine (1000 mg twice daily) in healthy volunteers. However, in one subject the exposure to atorvastatin and metabolites was increased by ~400% in the presence of ranolazine DiltiazemThe pharmacokinetics of diltiazem is not affected by ranolazine in healthy volunteers receiving diltiazem 60 mg three times daily and ranolazine 1000 mg twice daily.P-gp SubstratesRanolazine increases digoxin concentrations by 50% in healthy volunteers receiving ranolazine 1000 mg twice daily and digoxin 0.125 mg once daily [see Drug Interactions (7.2)]. CYP2D6 SubstratesRanolazine 750 mg twice daily increases the plasma concentrations of single dose of immediate release metoprolol (100 mg), CYP2D6 substrate, by 80% in extensive CYP2D6 metabolizers with no need for dose adjustment of metoprolol. In extensive metabolizers of dextromethorphan, substrate of CYP2D6, ranolazine inhibits partially the formation of the main metabolite dextrorphan.OCT2 SubstratesIn subjects with type diabetes mellitus, the exposure to metformin is increased by 40% and 80% following administration of ranolazine 500 mg twice daily and 1000 mg twice daily, respectively. If co-administered with ranolazine 1000 mg twice daily, do not exceed metformin doses of 1700 mg/day [see Drug Interactions (7.2)].

CLINICAL STUDIES SECTION.

14 CLINICAL STUDIES. 14.1Chronic Stable Angina. CARISA (Combination Assessment of Ranolazine In Stable Angina) was study in 823 chronic angina patients randomized to receive 12 weeks of treatment with twice-daily ranolazine 750 mg, 1000 mg, or placebo, who also continued on daily doses of atenolol 50 mg, amlodipine mg, or diltiazem CD 180 mg. Sublingual nitrates were used in this study as needed.In this trial, statistically significant (p <0.05) increases in modified Bruce treadmill exercise duration and time to angina were observed for each ranolazine dose versus placebo, at both trough (12 hours after dosing) and peak (4 hours after dosing) plasma levels, with minimal effects on blood pressure and heart rate. The changes versus placebo in exercise parameters are presented in Table 1. Exercise treadmill results showed no increase in effect on exercise at the 1000 mg dose compared to the 750 mg dose.Table Exercise Treadmill Results (CARISA)Mean Difference from Placebo (sec)StudyCARISA (N=791)Ranolazine Twice-daily Dose750 mg1000 mgExercise Duration Trough Peak 24 34 24 26 Time to Angina Trough Peak 30 38 26 38 Time to mm ST-Segment Depression Trough Peak 20 41 21 35 a p-value <=0.05 p-value <=0.005 The effects of ranolazine on angina frequency and nitroglycerin use are shown in Table 2.Table Angina Frequency and Nitroglycerin Use (CARISA) PlaceboRanolazine750 mg Ranolazine1000 mga Angina Frequency (attacks/week) 258 272 261 Mean 3.3 2.5 2.1 P- value vs placebo--0.006<0.001 Nitroglycerin Use (doses/week) 252 262 244 Mean 3.1 2.1 1.8 P- value vs placebo--0.016<0.001a Twice daily Tolerance to ranolazine did not develop after 12 weeks of therapy. Rebound increases in angina, as measured by exercise duration, have not been observed following abrupt discontinuation of ranolazine.Ranolazine has been evaluated in patients with chronic angina who remained symptomatic despite treatment with the maximum dose of an antianginal agent. In the ERICA (Efficacy of Ranolazine In Chronic Angina) trial, 565 patients were randomized to receive an initial dose of ranolazine 500 mg twice daily or placebo for week, followed by weeks of treatment with ranolazine 1000 mg twice daily or placebo, in addition to concomitant treatment with amlodipine 10 mg once daily. In addition, 45% of the study population also received long-acting nitrates. Sublingual nitrates were used as needed to treat angina episodes. Results are shown in Table 3. Statistically significant decreases in angina attack frequency (p=0.028) and nitroglycerin use (p=0.014) were observed with ranolazine compared to placebo. These treatment effects appeared consistent across age and use of long-acting nitrates.Table Angina Frequency and Nitroglycerin Use (ERICA) PlaceboRanolazinea Angina Frequency (attacks/week) 281 277 Mean 4.3 3.3 Median 2.4 2.2 Nitroglycerin Use (doses/week) 281 277 Mean 3.6 2.7 Median 1.7 1.3 1000 mg twice daily GenderEffects on angina frequency and exercise tolerance were considerably smaller in women than in men. In CARISA, the improvement in Exercise Tolerance Test (ETT) in females was about 33% of that in males at the 1000 mg twice-daily dose level. In ERICA, where the primary endpoint was angina attack frequency, the mean reduction in weekly angina attacks was 0.3 for females and 1.3 for males.RaceThere were insufficient numbers of non-Caucasian patients to allow for analyses of efficacy or safety by racial subgroup.. 14.2Lack of Benefit in Acute Coronary Syndrome. In large (n=6560) placebo-controlled trial (MERLIN-TIMI 36) in patients with acute coronary syndrome, there was no benefit shown on outcome measures. However, the study is somewhat reassuring regarding proarrhythmic risks, as ventricular arrhythmias were less common on ranolazine [see Clinical Pharmacology (12.2)] and there was no difference between ranolazine and placebo in the risk of all-cause mortality (relative risk ranolazine: placebo 0.99 with an upper 95% confidence limit of 1.22).

CONTRAINDICATIONS SECTION.

4 CONTRAINDICATIONS. Ranolazine is contraindicated in patients:Taking strong inhibitors of CYP3A [see Drug Interactions (7.1)] Taking inducers of CYP3A [see Drug Interactions (7.1)] With liver cirrhosis [see Use in Specific Populations (8.6)] Taking strong inhibitors of CYP3A [see Drug Interactions (7.1)] Taking inducers of CYP3A [see Drug Interactions (7.1)] With liver cirrhosis [see Use in Specific Populations (8.6)] Strong CYP3A inhibitors (e.g., ketoconazole, clarithromycin, nelfinavir) 4, 7.1) CYP3A inducers (e.g., rifampin, phenobarbital, St. Johns wort) 4, 7.1) Liver cirrhosis 4, 8.6) Strong CYP3A inhibitors (e.g., ketoconazole, clarithromycin, nelfinavir) 4, 7.1) CYP3A inducers (e.g., rifampin, phenobarbital, St. Johns wort) 4, 7.1) Liver cirrhosis 4, 8.6).

DESCRIPTION SECTION.

11 DESCRIPTION. Ranolazine extended-release tablet is available as film-coated, non-scored, extended-release tablet for oral administration.Ranolazine is racemic mixture, chemically described as 1-piperazineacetamide, N- (2, 6-dimethylphenyl)-4-[2-hydroxy-3-(2-methoxyphenoxy) propyl]-, (+-)-. It has an empirical formula of 24H 33N 3O 4, molecular weight of 427.54 g/mole, and the following structural formula: Ranolazine is white to off-white crystalline powder. Ranolazine is soluble in dichloromethane and methanol; sparingly soluble in tetrahydrofuran, and acetonitrile; slightly soluble in toluene.Ranolazine extended-release tablets contain 500 mg or 1000 mg of ranolazine and the following inactive ingredients: hypromellose, magnesium stearate, methacrylic acid copolymer Type (Copolymer based on ethyl acrylate and methacrylic acid and the surface-active agent such as sodium lauryl sulfate and polysorbate 80), microcrystalline cellulose and sodium hydroxide. Additional inactive ingredients for the 500 mg tablet include Macrogol/PEG, polyvinyl alcohol, polysorbate 80, sodium lauryl sulfate, talc, Iron Oxide Yellow, Iron Oxide Red and titanium dioxide; additional inactive ingredients for the 1000 mg tablet include lactose monohydrate, triacetin, Iron Oxide Yellow and titanium dioxide.. ranolazine-strct.jpg.

DOSAGE & ADMINISTRATION SECTION.

2 DOSAGE AND ADMINISTRATION. 500 mg twice daily and increase to 1000 mg twice daily, based on clinical symptoms 2.1) 2.1Dosing Information. Initiate ranolazine dosing at 500 mg twice daily and increase to 1000 mg twice daily, as needed, based on clinical symptoms. Take ranolazine with or without meals. Swallow ranolazine tablets whole; do not crush, break, or chew.The maximum recommended daily dose of ranolazine is 1000 mg twice daily.If dose of ranolazine is missed, take the prescribed dose at the next scheduled time; do not double the next dose.. 2.2Dose Modification. Dose adjustments may be needed when ranolazine is taken in combination with certain other drugs [see Drug Interactions (7.1)] Limit the maximum dose of ranolazine to 500 mg twice daily in patients on moderate CYP3A inhibitors such as diltiazem, verapamil, and erythromycin. Use of ranolazine with strong CYP3A inhibitors is contraindicated [see Contraindications (4), Drug Interactions (7.1)]. Use of P-gp inhibitors, such as cyclosporine, may increase exposure to ranolazine. Titrate ranolazine based on clinical response [see Drug Interactions (7.1)].

DOSAGE FORMS & STRENGTHS SECTION.

3 DOSAGE FORMS AND STRENGTHS. Ranolazine extended-release tablets 500 mg: Light orange colored, film coated oblong shaped tablets, debossed with C49 on one side and plain on the other side. Tablet dimensions approximately 16.70 mm (length), 8.10 mm (width).Ranolazine extended-release tablets 1000 mg: Yellow colored, film coated, oblong shaped tablets, debossed with C48 on one side and plain on the other side. Tablet dimensions approximately 21.60 mm (length), 10.60 mm (width).. Extended-release tablets: 500 mg, 1000 mg 3).

DRUG INTERACTIONS SECTION.

7 DRUG INTERACTIONS. Moderate CYP3A inhibitors (e.g., diltiazem, verapamil, erythromycin): Limit ranolazine to 500 mg twice daily. 7.1) P-gp inhibitors (e.g., cyclosporine): Ranolazine exposure increased. Titrate ranolazine based on clinical response. 7.1) CYP3A substrates: Limit simvastatin to 20 mg when used with ranolazine. Doses of other sensitive CYP3A substrates (e.g., lovastatin) and CYP3A substrates with narrow therapeutic range (e.g., cyclosporine, tacrolimus, sirolimus) may need to be reduced with ranolazine. 7.2) OCT2 substrates: Limit the dose of metformin to 1700 mg daily when used with ranolazine 1000 mg twice daily. Doses of other OCT2 substrates may require adjusted doses. 7.2) Drugs transported by P-gp (e.g., digoxin), or drugs metabolized by CYP2D6 (e.g., tricyclic antidepressants) may need reduced doses when used with ranolazine. 7.2) Moderate CYP3A inhibitors (e.g., diltiazem, verapamil, erythromycin): Limit ranolazine to 500 mg twice daily. 7.1) P-gp inhibitors (e.g., cyclosporine): Ranolazine exposure increased. Titrate ranolazine based on clinical response. 7.1) CYP3A substrates: Limit simvastatin to 20 mg when used with ranolazine. Doses of other sensitive CYP3A substrates (e.g., lovastatin) and CYP3A substrates with narrow therapeutic range (e.g., cyclosporine, tacrolimus, sirolimus) may need to be reduced with ranolazine. 7.2) OCT2 substrates: Limit the dose of metformin to 1700 mg daily when used with ranolazine 1000 mg twice daily. Doses of other OCT2 substrates may require adjusted doses. 7.2) Drugs transported by P-gp (e.g., digoxin), or drugs metabolized by CYP2D6 (e.g., tricyclic antidepressants) may need reduced doses when used with ranolazine. 7.2) 7.1Effects of Other Drugs on Ranolazine. Strong CYP3A InhibitorsDo not use ranolazine with strong CYP3A inhibitors, including ketoconazole, itraconazole, clarithromycin, nefazodone, nelfinavir, ritonavir, indinavir, and saquinavir [see Contraindications (4), Clinical Pharmacology (12.3)] Moderate CYP3A InhibitorsLimit the dose of ranolazine to 500 mg twice daily in patients on moderate CYP3A inhibitors, including diltiazem, verapamil, erythromycin, fluconazole, and grapefruit juice or grapefruit-containing products [see Dosage and Administration (2.2), Clinical Pharmacology (12.3)]. P-gp InhibitorsConcomitant use of ranolazine and P-gp inhibitors, such as cyclosporine, may result in increases in ranolazine concentrations. Titrate ranolazine based on clinical response in patients concomitantly treated with predominant P-gp inhibitors such as cyclosporine [see Dosage and Administration (2.2)]. CYP3A InducersDo not use ranolazine with CYP3A inducers such as rifampin, rifabutin, rifapentine, phenobarbital, phenytoin, carbamazepine, and St. Johns wort [see Contraindications (4), Clinical Pharmacology (12.3)] . 7.2Effects of Ranolazine on Other Drugs. Drugs Metabolized by CYP3ALimit the dose of simvastatin in patients on any dose of ranolazine to 20 mg once daily, when ranolazine is co-administered. Dose adjustment of other sensitive CYP3A substrates (e.g., lovastatin) and CYP3A substrates with narrow therapeutic range (e.g., cyclosporine, tacrolimus, sirolimus) may be required as ranolazine may increase plasma concentrations of these drugs [see Clinical Pharmacology (12.3)] Drugs Transported by P-gpConcomitant use of ranolazine and digoxin results in increased exposure to digoxin. The dose of digoxin may have to be adjusted [see Clinical Pharmacology (12.3)]. Drugs Metabolized by CYP2D6The exposure to CYP2D6 substrates, such as tricyclic antidepressants and antipsychotics, may be increased during co-administration with ranolazine, and lower doses of these drugs may be required.Drugs Transported by OCT2In subjects with type diabetes mellitus, concomitant use of ranolazine 1000 mg twice daily and metformin results in increased plasma levels of metformin. When ranolazine 1000 mg twice daily is co-administered with metformin, metformin dose should not exceed 1700 mg/day. Monitor blood glucose levels and risks associated with high exposures of metformin.Metformin exposure was not significantly increased when given with ranolazine 500 mg twice daily [see Clinical Pharmacology (12.3)].

GERIATRIC USE SECTION.

8.5 Geriatric Use. Of the chronic angina patients treated with ranolazine in controlled studies, 496 (48%) were >=65 years of age, and 114 (11%) were >=75 years of age. No overall differences in efficacy were observed between older and younger patients. There were no differences in safety for patients >=65 years compared to younger patients, but patients >=75 years of age on ranolazine, compared to placebo, had higher incidence of adverse events, serious adverse events, and drug discontinuations due to adverse events. In general, dose selection for an elderly patient should usually start at the low end of the dosing range, reflecting the greater frequency of decreased hepatic, renal, or cardiac function, and of concomitant disease, or other drug therapy.

HOW SUPPLIED SECTION.

16 HOW SUPPLIED/STORAGE AND HANDLING. Ranolazine extended-release tablet is supplied as in the following strengths:Ranolazine extended-release tablets 500 mg: Light orange colored, film coated oblong shaped tablets, debossed with C49 on one side and plain on the other side. Tablet dimensions approximately 16.70 mm (length), 8.10 mm (width).Bottles of 60 NDC 42571-324-60Bottles of 180 NDC 42571-324-64Bottles of 500 NDC 42571-324-05Carton of 100(10 x10) Unit-dose Tablets NDC 42571-324-11Ranolazine extended-release tablets 1000 mg: Yellow colored, film coated, oblong shaped tablets, debossed with C48 on one side and plain on the other side. Tablet dimensions approximately 21.60 mm (length), 10.60 mm (width).Bottles of 60 NDC 42571-325-60Bottles of 180 NDC 42571-325-64Carton of 100(10 x10) Unit-dose Tablets NDC 42571-325-11Store ranolazine tablets at 25C (77F) with excursions permitted to 15 to 30C (59 to 86F). [see USP Controlled Room Temperature.].

INDICATIONS & USAGE SECTION.

1 INDICATIONS AND USAGE. Ranolazine extended-release tablet is indicated for the treatment of chronic angina.Ranolazine may be used with beta-blockers, nitrates, calcium channel blockers, anti- platelet therapy, lipid-lowering therapy, ACE inhibitors, and angiotensin receptor blockers.. Ranolazine extended-release tablet is an antianginal indicated for the treatment of chronic angina. 1).

INFORMATION FOR PATIENTS SECTION.

17 PATIENT COUNSELING INFORMATION. Advise the patient to read the FDA-approved patient labeling (Patient Information). Inform patients that ranolazine will not abate an acute angina episode.Strong CY3PA Inhibitors, CYP3A Inducers, Liver CirrhosisInform patients that ranolazine should not be used with drugs that are strong CYP3A inhibitors (e.g., ketoconazole, clarithromycin, nefazodone, ritonavir) [see Contraindications (4), Drug Interactions (7.1)]. Inform patients that ranolazine should not be used with drugs that are inducers of CYP3A (e.g., rifampin, rifabutin, rifapentine, barbiturates, carbamazepine, phenytoin, St. Johns wort) [see Contraindications (4), Drug Interactions (7.1)]. Inform patients that ranolazine should not be used in patients with liver cirrhosis [(see Contraindications (4), Use in Specific Populations (8.6)]. Moderate CYP3A Inhibitors, P-gp Inhibitors, Grapefruit ProductsAdvise patients to inform their physician if they are receiving drugs that are moderate CYP3A inhibitors (e.g., diltiazem, verapamil, erythromycin) [see Drug Interactions (7)]. Advise patients to inform their physician if they are receiving drugs that are P-gp inhibitors (e.g., cyclosporine) [see Drug Interactions (7)]. Advise patients to limit grapefruit juice or grapefruit products when taking ranolazine [see Drug Interactions (7)]. QT Interval ProlongationInform patients that ranolazine may produce changes in the electrocardiogram (QTc interval prolongation) [see Warnings and Precautions (5.1)]. Advise patients to inform their physician of any personal or family history of QTc prolongation, congenital long QT syndrome, or if they are receiving drugs that prolong the QTc interval such as Class Ia (e.g., quinidine) or Class III (e.g., dofetilide, sotalol, amiodarone) antiarrhythmic agents, erythromycin, and certain antipsychotics (e.g., thioridazine, ziprasidone) [see Warnings and Precautions (5.1)]. Use in Patients with Renal ImpairmentPatients with severe renal impairment may be at risk of renal failure while on ranolazine. Advise patients to inform their physician if they have impaired renal function before or while taking ranolazine [see Warnings and Precautions (5.2)]. Dizziness, FaintingInform patients that ranolazine may cause dizziness and lightheadedness. Patients should know how they react to ranolazine before they operate an automobile or machinery, or engage in activities requiring mental alertness or coordination [see Adverse Reactions (6.1)]. Advise patients to contact their physician if they experience fainting spells while taking ranolazine.AdministrationInstruct patients to swallow ranolazine tablets whole, with or without meals, and not to crush, break, or chew tablets. Inform patients that if dose is missed, to take the usual dose at the next scheduled time. The next dose should not be doubled. Inform patients that doses of ranolazine higher than 1000 mg twice daily should not be used [see Dosage and Administration (2)]. Advise patients to inform their physician of any other medications taken concurrently with ranolazine, including over-the-counter medications.The brands listed are trademarks of their respective owners and are not trademarks of Micro Labs. The makers of these brands are not affiliated with and do not endorse Micro Labs or its products.Manufactured by: Micro Labs Limited Goa- 403 722, INDIA. Manufactured for: Micro Labs USA, Inc. Somerset, NJ 08873 Rev.10/2021.

LACTATION SECTION.

8.2 Lactation. Risk SummaryThere are no data on the presence of ranolazine in human milk, the effects on the breastfed infant, or the effects on milk production. However, ranolazine is present in rat milk [see Use in Specific Populations (8.1)] The developmental and health benefits of breastfeeding should be considered along with the mothers clinical need for ranolazine and any potential adverse effects on the breastfed infant from ranolazine or from the underlying maternal condition. Adult female rats were administered ranolazine orally from gestation day through postnatal day 20. No adverse effects on pup development, behavior, or reproduction parameters were observed at maternal dosage level of 60 mg/kg/day (equal to the MHRD based on AUC). At maternally toxic doses, male and female pups exhibited increased mortality and decreased body weight, and female pups showed increased motor activity. The pups were potentially exposed to low amounts of ranolazine via the maternal milk.

MECHANISM OF ACTION SECTION.

12.1 Mechanism of Action. The mechanism of action of ranolazines antianginal effects has not been determined. Ranolazine has anti-ischemic and antianginal effects that do not depend upon reductions in heart rate or blood pressure. It does not affect the rate-pressure product, measure of myocardial work, at maximal exercise. Ranolazine at therapeutic levels can inhibit the cardiac late sodium current (I Na). However, the relationship of this inhibition to angina symptoms is uncertain. The QT prolongation effect of ranolazine on the surface electrocardiogram is the result of inhibition of Kr, which prolongs the ventricular action potential.

NONCLINICAL TOXICOLOGY SECTION.

13 NONCLINICAL TOXICOLOGY. 13.1 Carcinogenesis, Mutagenesis, Impairment Of Fertility. Ranolazine tested negative for genotoxic potential in the following assays: Ames bacterial mutation assay, Saccharomyces assay for mitotic gene conversion, chromosomal aberrations assay in Chinese hamster ovary (CHO) cells, mammalian CHO/HGPRT gene mutation assay, and mouse and rat bone marrow micronucleus assays.There was no evidence of carcinogenic potential in mice or rats. The highest oral doses used in the carcinogenicity studies were 150 mg/kg/day for 21 months in rats (900 mg/m 2/day) and 50 mg/kg/day for 24 months in mice (150 mg/m 2/day). These maximally tolerated doses are 0.8 and 0.1 times, respectively, the daily maximum recommended human dose (MRHD) of 2000 mg on surface area basis. published study reported that ranolazine promoted tumor formation and progression to malignancy when given to transgenic APC (min/+) mice at dose of 30 mg/kg twice daily [see References (15)]. The clinical significance of this finding is unclear. In male and female rats, oral administration of ranolazine that produced exposures (AUC) approximatelty 3-fold or 5-fold higher, respectively, than the MRHD had no effect on fertility.

PHARMACODYNAMICS SECTION.

12.2 Pharmacodynamics. Hemodynamic EffectsPatients with chronic angina treated with ranolazine in controlled clinical studies had minimal changes in mean heart rate (<2 bpm) and systolic blood pressure (<3 mm Hg). Similar results were observed in subgroups of patients with CHF NYHA Class or II, diabetes, or reactive airway disease, and in elderly patients.Electrocardiographic EffectsDose and plasma concentration-related increases in the QTc interval [see Warnings and Precautions (5.1)], reductions in wave amplitude, and, in some cases, notched waves, have been observed in patients treated with ranolazine. These effects are believed to be caused by ranolazine and not by its metabolites. The relationship between the change in QTc and ranolazine plasma concentrations is linear, with slope of about 2.6 msec/1000 ng/mL, through exposures corresponding to doses several-fold higher than the maximum recommended dose of 1000 mg twice daily. The variable blood levels attained after given dose of ranolazine give wide range of effects on QTc. At max following repeat dosing at 1000 mg twice daily, the mean change in QTc is about msec, but in the 5% of the population with the highest plasma concentrations, the prolongation of QTc is at least 15 msec. In cirrhotic subjects with mild or moderate hepatic impairment, the relationship between plasma level of ranolazine and QTc is much steeper [see Contraindications (4)] Age, weight, gender, race, heart rate, congestive heart failure, diabetes, and renal impairment did not alter the slope of the QTc-concentration relationship of ranolazine.No proarrhythmic effects were observed on 7-day Holter recordings in 3162 acute coronary syndrome patients treated with ranolazine. There was significantly lower incidence of arrhythmias (ventricular tachycardia, bradycardia, supraventricular tachycardia, and new atrial fibrillation) in patients treated with ranolazine (80%) versus placebo (87%), including ventricular tachycardia >=3 beats (52% versus 61%). However, this difference in arrhythmias did not lead to reduction in mortality, reduction in arrhythmia hospitalization, or reduction in arrhythmia symptoms.

PHARMACOKINETICS SECTION.

12.3 Pharmacokinetics. Ranolazine is extensively metabolized in the gut and liver and its absorption is highly variable. For example, at dose of 1000 mg twice daily, the mean steady-state max was 2600 ng/mL with 95% confidence limits of 400 and 6100 ng/mL. The pharmacokinetics of the (+) R- and (-) S-enantiomers of ranolazine are similar in healthy volunteers. The apparent terminal half-life of ranolazine is hours. Steady state is generally achieved within days of twice-daily dosing with ranolazine. At steady state over the dose range of 500 to 1000 mg twice daily, max and AUC to increase slightly more than proportionally to dose, 2.2- and 2.4-fold, respectively. With twice-daily dosing, the trough: peak ratio of the ranolazine plasma concentration is 0.3 to 0.6. The pharmacokinetics of ranolazine is unaffected by age, gender, or food. Absorption and DistributionAfter oral administration of ranolazine, peak plasma concentrations of ranolazine are reached between and hours. After oral administration of 14C-ranolazine as solution, 73% of the dose is systemically available as ranolazine or metabolites. The bioavailability of ranolazine from ranolazine tablets relative to that from solution of ranolazine is 76%. Because ranolazine is substrate of P-gp, inhibitors of P-gp may increase the absorption of ranolazine. Food (high-fat breakfast) has no important effect on the max and AUC of ranolazine. Therefore, ranolazine may be taken without regard to meals. Over the concentration range of 0.25 to 10 ug/mL, ranolazine is approximately 62% bound to human plasma proteins. Metabolism and ExcretionRanolazine is metabolized mainly by CYP3A and, to lesser extent, by CYP2D6. Following single oral dose of ranolazine solution, approximately 75% of the dose is excreted in urine and 25% in feces. Ranolazine is metabolized rapidly and extensively in the liver and intestine; less than 5% is excreted unchanged in urine and feces. The pharmacologic activity of the metabolites has not been well characterized. After dosing to steady state with 500 mg to 1500 mg twice daily, the four most abundant metabolites in plasma have AUC values ranging from about to 33% that of ranolazine, and display apparent half-lives ranging from to 22 hours.Drug InteractionsEffect of Other Drugs on RanolazineIn vitro data indicate that ranolazine is substrate of CYP3A and, to lesser degree, of CYP2D6. Ranolazine is also substrate of P-glycoprotein.Strong CYP3A InhibitorsPlasma levels of ranolazine with ranolazine 1000 mg twice daily are increased by 220% when co-administered with ketoconazole 200 mg twice daily [see Contraindications (4)]. Moderate CYP3A InhibitorsPlasma levels of ranolazine with ranolazine 1000 mg twice daily are increased by 50 to 130% by diltiazem 180 to 360 mg, respectively. Plasma levels of ranolazine with ranolazine 750 mg twice daily are increased by 100% by verapamil 120 mg three times daily [see Drug Interactions (7.1)]. Weak CYP3A InhibitorsThe weak CYP3A inhibitors simvastatin (20 mg once daily) and cimetidine (400 mg three times daily) do not increase the exposure to ranolazine in healthy volunteers.CYP3A InducersRifampin 600 mg once daily decreases the plasma concentrations of ranolazine (1000 mg twice daily) by approximately 95% [see Contraindications (4)]. CYP2D6 InhibitorsParoxetine 20 mg once daily increased ranolazine concentrations by 20% in healthy volunteers receiving ranolazine 1000 mg twice daily. No dose adjustment of ranolazine is required in patients treated with CYP2D6 inhibitors.DigoxinPlasma concentrations of ranolazine are not significantly altered by concomitant digoxin at 0.125 mg once daily.Effect of Ranolazine on Other DrugsIn vitro ranolazine and its O-demethylated metabolite are weak inhibitors of CYP3A and moderate inhibitors of CYP2D6 and P-gp. In vitro ranolazine is an inhibitor of OCT2.CYP3A SubstratesThe plasma levels of simvastatin, CYP3A substrate, and its active metabolite are increased by 100% in healthy volunteers receiving 80 mg once daily and ranolazine1000 mg twice daily [see Drug Interactions (7.2)] Mean exposure to atorvastatin (80 mg daily) is increased by 40% following co-administration with ranolazine (1000 mg twice daily) in healthy volunteers. However, in one subject the exposure to atorvastatin and metabolites was increased by ~400% in the presence of ranolazine DiltiazemThe pharmacokinetics of diltiazem is not affected by ranolazine in healthy volunteers receiving diltiazem 60 mg three times daily and ranolazine 1000 mg twice daily.P-gp SubstratesRanolazine increases digoxin concentrations by 50% in healthy volunteers receiving ranolazine 1000 mg twice daily and digoxin 0.125 mg once daily [see Drug Interactions (7.2)]. CYP2D6 SubstratesRanolazine 750 mg twice daily increases the plasma concentrations of single dose of immediate release metoprolol (100 mg), CYP2D6 substrate, by 80% in extensive CYP2D6 metabolizers with no need for dose adjustment of metoprolol. In extensive metabolizers of dextromethorphan, substrate of CYP2D6, ranolazine inhibits partially the formation of the main metabolite dextrorphan.OCT2 SubstratesIn subjects with type diabetes mellitus, the exposure to metformin is increased by 40% and 80% following administration of ranolazine 500 mg twice daily and 1000 mg twice daily, respectively. If co-administered with ranolazine 1000 mg twice daily, do not exceed metformin doses of 1700 mg/day [see Drug Interactions (7.2)].

PREGNANCY SECTION.

8.1 Pregnancy. Risk SummaryThere are no available data on ranolazine use in pregnant women to inform any drug- associated risks. Studies in rats and rabbits showed no evidence of fetal harm at exposures times the maximum recommended human dose (MRHD) (see Data). In the U.S. general population, the estimated background risk of major birth defects and of miscarriage of clinically recognized pregnancies is to 4% and 15 to 20%, respectively.DataAnimal DataEmbryofetal toxicity studies were conducted in rats and rabbits orally administered ranolazine during organogenesis. In rats, decreased fetal weight and reduced ossification were observed at doses (corresponding to 4-fold the AUC for the MRHD) that caused maternal weight loss. No adverse fetal effects were observed in either species exposed (AUC) to ranolazine at exposures (AUC) equal to the MRHD.

REFERENCES SECTION.

15 REFERENCES. M.A. Suckow et al. The anti-ischemia agent ranolazine promotes the development of intestinal tumors in APC (min/+) mice. Cancer Letters 209(2004):165 to 9.

SPL UNCLASSIFIED SECTION.

2.1Dosing Information. Initiate ranolazine dosing at 500 mg twice daily and increase to 1000 mg twice daily, as needed, based on clinical symptoms. Take ranolazine with or without meals. Swallow ranolazine tablets whole; do not crush, break, or chew.The maximum recommended daily dose of ranolazine is 1000 mg twice daily.If dose of ranolazine is missed, take the prescribed dose at the next scheduled time; do not double the next dose.

USE IN SPECIFIC POPULATIONS SECTION.

8 USE IN SPECIFIC POPULATIONS. 8.1 Pregnancy. Risk SummaryThere are no available data on ranolazine use in pregnant women to inform any drug- associated risks. Studies in rats and rabbits showed no evidence of fetal harm at exposures times the maximum recommended human dose (MRHD) (see Data). In the U.S. general population, the estimated background risk of major birth defects and of miscarriage of clinically recognized pregnancies is to 4% and 15 to 20%, respectively.DataAnimal DataEmbryofetal toxicity studies were conducted in rats and rabbits orally administered ranolazine during organogenesis. In rats, decreased fetal weight and reduced ossification were observed at doses (corresponding to 4-fold the AUC for the MRHD) that caused maternal weight loss. No adverse fetal effects were observed in either species exposed (AUC) to ranolazine at exposures (AUC) equal to the MRHD.. 8.2 Lactation. Risk SummaryThere are no data on the presence of ranolazine in human milk, the effects on the breastfed infant, or the effects on milk production. However, ranolazine is present in rat milk [see Use in Specific Populations (8.1)] The developmental and health benefits of breastfeeding should be considered along with the mothers clinical need for ranolazine and any potential adverse effects on the breastfed infant from ranolazine or from the underlying maternal condition. Adult female rats were administered ranolazine orally from gestation day through postnatal day 20. No adverse effects on pup development, behavior, or reproduction parameters were observed at maternal dosage level of 60 mg/kg/day (equal to the MHRD based on AUC). At maternally toxic doses, male and female pups exhibited increased mortality and decreased body weight, and female pups showed increased motor activity. The pups were potentially exposed to low amounts of ranolazine via the maternal milk.. 8.4 Pediatric Use. Safety and effectiveness have not been established in pediatric patients.. 8.5 Geriatric Use. Of the chronic angina patients treated with ranolazine in controlled studies, 496 (48%) were >=65 years of age, and 114 (11%) were >=75 years of age. No overall differences in efficacy were observed between older and younger patients. There were no differences in safety for patients >=65 years compared to younger patients, but patients >=75 years of age on ranolazine, compared to placebo, had higher incidence of adverse events, serious adverse events, and drug discontinuations due to adverse events. In general, dose selection for an elderly patient should usually start at the low end of the dosing range, reflecting the greater frequency of decreased hepatic, renal, or cardiac function, and of concomitant disease, or other drug therapy.. 8.6Use in Patients with Hepatic Impairment. Ranolazine is contraindicated in patients with liver cirrhosis. In study of cirrhotic patients, the max of ranolazine was increased 30% in cirrhotic patients with mild (Child- Pugh Class A) hepatic impairment, but increased 80% in cirrhotic patients with moderate (Child-Pugh Class B) hepatic impairment compared to patients without hepatic impairment. This increase was not enough to account for the 3-fold increase in QT prolongation seen in cirrhotic patients with mild to moderate hepatic impairment [see Clinical Pharmacology (12.2)] . 8.7Use in Patients with Renal Impairment. pharmacokinetic study of ranolazine in subjects with severe renal impairment (CrCL <30 mL/min) was stopped when of subjects developed acute renal failure after receiving ranolazine 500 mg twice daily for days (lead-in phase) followed by 1000 mg twice day (1 dose in one subject and 11 doses in the other). Increases in creatinine, BUN, and potassium were observed in subjects during the 500 mg lead-in phase. One subject required hemodialysis, while the other subjects improved upon drug discontinuation [see Warnings and Precautions (5.2)]. Monitor renal function periodically in patients with moderate to severe renal impairment. Discontinue ranolazine if acute renal failure develops. In separate study, max was increased between 40% and 50% in patients with mild, moderate, or severe renal impairment compared to patients with no renal impairment, suggesting similar increase in exposure in patients with renal failure independent of the degree of impairment. The pharmacokinetics of ranolazine has not been assessed in patients on dialysis. 8.8Use in Patients with Heart Failure. Heart failure (NYHA Class to IV) had no significant effect on ranolazine pharmacokinetics. Ranolazine had minimal effects on heart rate and blood pressure in patients with angina and heart failure NYHA Class to IV. No dose adjustment of ranolazine is required in patients with heart failure.. 8.9Use in Patients with Diabetes Mellitus. population pharmacokinetic evaluation of data from angina patients and healthy subjects showed no effect of diabetes on ranolazine pharmacokinetics. No dose adjustment is required in patients with diabetes.Ranolazine produces small reductions in HbA1c in patients with diabetes, the clinical significance of which is unknown. Ranolazine should not be considered treatment for diabetes.

WARNINGS AND PRECAUTIONS SECTION.

5 WARNINGS AND PRECAUTIONS. QT interval prolongation: Can occur with ranolazine. Little data available on high doses, long exposure, use with QT interval-prolonging drugs, potassium channel variants causing prolonged QT interval, in patients with family history of (or congenital) long QT syndrome, or in patients with known acquired QT interval prolongation. 5.1) Renal failure: Monitor renal function after initiation and periodically in patients with moderate to severe renal impairment (CrCL<60 mL/min). If acute renal failure develops, discontinue ranolazine. 5.2) QT interval prolongation: Can occur with ranolazine. Little data available on high doses, long exposure, use with QT interval-prolonging drugs, potassium channel variants causing prolonged QT interval, in patients with family history of (or congenital) long QT syndrome, or in patients with known acquired QT interval prolongation. 5.1) Renal failure: Monitor renal function after initiation and periodically in patients with moderate to severe renal impairment (CrCL<60 mL/min). If acute renal failure develops, discontinue ranolazine. 5.2) 5.1QT Interval Prolongation. Ranolazine blocks Kr and prolongs the QTc interval in dose-related manner. Clinical experience in an acute coronary syndrome population did not show an increased risk of proarrhythmia or sudden death [see Clinical Studies (14.2)] However, there is little experience with high doses (>1000 mg twice daily) or exposure, other QT- prolonging drugs, potassium channel variants resulting in long QT interval, in patients with family history of (or congenital) long QT syndrome, or in patients with known acquired QT interval prolongation. 5.2Renal Failure. Acute renal failure has been observed in some patients with severe renal impairment (creatinine clearance [CrCL] <30 mL/min) while taking ranolazine. If acute renal failure develops (e.g., marked increase in serum creatinine associated with an increase in blood urea nitrogen [BUN]), discontinue ranolazine and treat appropriately [see Use in Specific Populations (8.7)] Monitor renal function after initiation and periodically in patients with moderate to severe renal impairment (CrCL <60 mL/min) for increases in serum creatinine accompanied by an increase in BUN.