LABORATORY TESTS SECTION.

6.1 Clinical Trials Experience. Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in 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.The most common adverse reactions (>= 10%) reported during clinical trials were eye pain, vision blurred, eye irritation, ocular hyperaemia, instillation site discomfort, eye pruritus, lacrimation increased, and ocular deposits.

PACKAGE LABEL.PRINCIPAL DISPLAY PANEL.

PACKAGE LABEL.PRINCIPAL DISPLAY PANEL. NDC 55292-410-05 Cystadrops (R) (cysteamine ophthalmic solution) 0.37 For Topical Ophthalmic Use Rx only x mL sterile Recordati Rare Diseases GROUP Manufactured by: Baccinex SA Courroux, Switzerland For: Recordati Rare Diseases Inc. Lebanon, NJ 08833 U.S.A. CDRCRT LOT: 12345678A EXP: 20XX/MM S/N: 123456789012 GTIN: 12345678901234 NDC 55292-410-05 Rx only Cystadrops (R) (cysteamine ophthalmic solution) 0.37 5 mL sterile Recordati Rare Diseases Inc. CDRLBL Lot: EXP: YYYY/MM.

PEDIATRIC USE SECTION.

8.4 Pediatric Use. The safety and effectiveness of CYSTADROPS has been established in pediatric patients. Use of CYSTADROPS is supported by adequate and well controlled trials in pediatric patients and additional experience supporting the safety of CYSTADROPS.

PHARMACOKINETICS SECTION.

12.3 Pharmacokinetics. The peak plasma concentration of cysteamine following ocular administration of cysteamine ophthalmic solution in humans is unknown, because all patients concomitantly received oral cysteamine and the total daily ophthalmic dose is less than 4% of the recommended oral daily dose of cysteamine.

LACTATION SECTION.

8.2 Lactation. Risk SummaryThere is no information regarding the presence of cysteamine in human milk, the effects on the breastfed infants, or the effects on milk production. Cysteamine administered orally is present in milk of lactating rats. It is not known whether measurable levels of cysteamine would be present in maternal milk following topical ocular administration of CYSTADROPS. The developmental and health benefits of breastfeeding should be considered along with the mothers clinical need for CYSTADROPS and any potential adverse effects on the breastfed child from CYSTADROPS or from the underlying maternal conditions.

ADVERSE REACTIONS SECTION.

6 ADVERSE REACTIONS. The most common adverse reactions (>= 10%) are eye pain, vision blurred, eye irritation, ocular hyperaemia, instillation site discomfort, eye pruritus, lacrimation increased, and ocular deposits. (6)To report SUSPECTED ADVERSE REACTIONS, contact Recordati Rare Diseases Inc. at 1-888-575-8344, or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trials Experience. Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in 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.The most common adverse reactions (>= 10%) reported during clinical trials were eye pain, vision blurred, eye irritation, ocular hyperaemia, instillation site discomfort, eye pruritus, lacrimation increased, and ocular deposits.

CARCINOGENESIS & MUTAGENESIS & IMPAIRMENT OF FERTILITY SECTION.

13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility. CarcinogenesisCysteamine has not been tested for its carcinogenic potential in long-term animal studies. MutagenesisCysteamine was not mutagenic in the Ames test. It produced negative response in an in vitro sister chromatid exchange assay in human lymphocytes but positive response in similar assay in hamster ovarian cells.Impairment of FertilityRepeat breeding reproduction studies were conducted in male and female rats. Cysteamine was found to have no effect on fertility and reproductive performance at an oral dose of 75 mg/kg/day (480 times the recommended human ophthalmic dose based on body surface area). At an oral dose of 375 mg/kg/day (2,400 times the recommended human ophthalmic dose based on body surface area), it reduced the fertility of the adult rats and the survival of their offspring.

CLINICAL PHARMACOLOGY SECTION.

12 CLINICAL PHARMACOLOGY. 12.1 Mechanism of Action. Cysteamine acts as cystine-depleting agent by converting cystine to cysteine and cysteine-cysteamine mixed disulfides and reduces corneal cystine crystal accumulation.. 12.3 Pharmacokinetics. The peak plasma concentration of cysteamine following ocular administration of cysteamine ophthalmic solution in humans is unknown, because all patients concomitantly received oral cysteamine and the total daily ophthalmic dose is less than 4% of the recommended oral daily dose of cysteamine.

MECHANISM OF ACTION SECTION.

12.1 Mechanism of Action. Cysteamine acts as cystine-depleting agent by converting cystine to cysteine and cysteine-cysteamine mixed disulfides and reduces corneal cystine crystal accumulation.

NONCLINICAL TOXICOLOGY SECTION.

13 NONCLINICAL TOXICOLOGY. 13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility. CarcinogenesisCysteamine has not been tested for its carcinogenic potential in long-term animal studies. MutagenesisCysteamine was not mutagenic in the Ames test. It produced negative response in an in vitro sister chromatid exchange assay in human lymphocytes but positive response in similar assay in hamster ovarian cells.Impairment of FertilityRepeat breeding reproduction studies were conducted in male and female rats. Cysteamine was found to have no effect on fertility and reproductive performance at an oral dose of 75 mg/kg/day (480 times the recommended human ophthalmic dose based on body surface area). At an oral dose of 375 mg/kg/day (2,400 times the recommended human ophthalmic dose based on body surface area), it reduced the fertility of the adult rats and the survival of their offspring.

CLINICAL STUDIES SECTION.

14 CLINICAL STUDIES. Clinical safety and efficacy of CYSTADROPS were assessed in two studies: single-arm study conducted for years (OCT-1) and randomized controlled study conducted for 90 days (CHOC). In the OCT-1 study, patients with cystinosis (2 males and females) with mean age of 12.1 +- 4.6 (range: 7.0 21.0) were enrolled and received median of drops/eye/day of CYSTADROPS. In CHOC study, 32 patients with cystinosis (15 males and 17 females) with mean age of 17.1 +- 13.0 (range: 2.9 62.6) were enrolled and received median of drops/eye/day. Fifteen patients were exposed to CYSTADROPS and 16 were exposed to cysteamine hydrochloride 0.1% (control arm). Efficacy was assessed with In-Vivo Confocal Microscopy total score (IVCM score) by quantifying the cystine crystals in the cornea. decrease in IVCM total score from baseline indicated reduction in corneal crystals. In the CHOC study, after 30 and 90 days of treatment with CYSTADROPS, 12% and 40% reduction in the total IVCM total score across all corneal layers was observed from baseline, respectively. CYSTADROPS demonstrated greater reduction compared to the control arm at 90 days. The average reduction in IVCM total score was 4.6 in the CYSTADROPS arm and 0.5 in the control arm, mean difference 3.8 (95% CI: (2.1, 5.6)).In the OCT-1 study, mean decrease in corneal cystine crystal deposits of 30%, in comparison with baseline, was maintained over the 60 month period of the study.

CONTRAINDICATIONS SECTION.

4 CONTRAINDICATIONS. None.. None. (4).

DESCRIPTION SECTION.

11 DESCRIPTION. CYSTADROPS is sterile, viscous, ophthalmic solution containing 3.8 mg/mL of cysteamine (0.37%) equivalent to 5.6 mg/mL of cysteamine hydrochloride (0.55%). Cysteamine is cystine- depleting agent which lowers the cystine content of cells in patients with cystinosis. Molecular Formula: C2H7NS HCl Molecular Weight: 113.61Each milliliter of CYSTADROPS contains: Active: cysteamine 3.8 mg (equivalent to cysteamine hydrochloride 5.6 mg); Preservative: benzalkonium chloride 0.1 mg; Inactive Ingredients: carmellose sodium, citric acid monohydrate, disodium edetate dihydrate, hydrochloric acid and sodium hydroxide (to adjust pH to 4.6-5.4), and water for injection.

DOSAGE & ADMINISTRATION SECTION.

2 DOSAGE AND ADMINISTRATION. Instill one drop of CYSTADROPS in each eye, times day during waking hours. (2.1) 2.1 Dosage Information. Instill one drop of CYSTADROPS in each eye, times day during waking hours.Do not touch dropper tip to the eyelids, surrounding areas, or any surface, as this may contaminate the solution.In case of concomitant therapy with other topical ocular products, an interval of 10 minutes should be allowed between successive applications. Eye ointments should be administered last. If the patient misses an instillation, the patient should be told to administer dose as soon as feasible and then continue the treatment with the next scheduled instillation. Discard bottle days after first opening. 2.2 Preparation for Administration. Patients should be advised to store new unopened CYSTADROPS bottles in the refrigerator in the original carton between 36F to 46F (2C to 8C). Each week, one new bottle should be removed from the refrigerator. Patients are to write the date the bottle was opened in the space on the carton. After first opening, store opened CYSTADROPS at room temperature between 68F to 77F (20C to 25C). Do not refrigerate after opening. Patients are to wash their hands carefully in order to avoid microbiological contamination of the content in the bottle. Remove the green protective cap (see Figure A). Remove the metal seal (see Figure B). Remove the gray stopper (see Figure C) from the bottle. Do not touch the opening of the bottle after removing the gray stopper. Take the dropper out of its packaging, without touching the end intended to be attached to the bottle, attach it (see Figure D) to the bottle and do not remove it.Patients should be advised not to lose the small white cap that comes on the top of the dropper (see Figure E). Keep the small white cap tightly closed when not in use. Instill one drop of CYSTADROPS in each eye, times day during waking hours. At the end of days, patients should discard the bottle. There may be medication left in the bottle; however, the bottle must be discarded by the patient because the medication is only stable for days after first opening. Patients should be advised to store new unopened CYSTADROPS bottles in the refrigerator in the original carton between 36F to 46F (2C to 8C). Each week, one new bottle should be removed from the refrigerator. Patients are to write the date the bottle was opened in the space on the carton. After first opening, store opened CYSTADROPS at room temperature between 68F to 77F (20C to 25C). Do not refrigerate after opening. Patients are to wash their hands carefully in order to avoid microbiological contamination of the content in the bottle. Remove the green protective cap (see Figure A). Remove the metal seal (see Figure B). Remove the gray stopper (see Figure C) from the bottle. Do not touch the opening of the bottle after removing the gray stopper. Take the dropper out of its packaging, without touching the end intended to be attached to the bottle, attach it (see Figure D) to the bottle and do not remove it.. Patients should be advised not to lose the small white cap that comes on the top of the dropper (see Figure E). Keep the small white cap tightly closed when not in use. Instill one drop of CYSTADROPS in each eye, times day during waking hours. At the end of days, patients should discard the bottle. There may be medication left in the bottle; however, the bottle must be discarded by the patient because the medication is only stable for days after first opening.

DOSAGE FORMS & STRENGTHS SECTION.

3 DOSAGE FORMS AND STRENGTHS. Ophthalmic solution containing 3.8 mg/mL of cysteamine (0.37%).. Ophthalmic solution containing 3.8 mg/mL of cysteamine (0.37%). (3).

GERIATRIC USE SECTION.

8.5 Geriatric Use. Clinical studies of CYSTADROPS did not include sufficient numbers of subjects aged 65 and over to determine whether they respond differently from younger subjects. Other reported clinical experience has not identified differences in responses between the elderly and younger patients.

HOW SUPPLIED SECTION.

16 HOW SUPPLIED/STORAGE AND HANDLING. CYSTADROPS (cysteamine ophthalmic solution) 0.37% is supplied as 5 mL sterile viscous solution in 10 mL amber glass bottle closed by bromobutyl stopper and sealed with an aluminum tear-off cap. PVC dropper applicator with HDPE closure is packed separately and included in each carton box.Each carton box (NDC 55292-410-05) contains bottle (NDC 55292-410-05) and dropper applicator individually wrapped.Before First Opening: Before opening, store new, unopened CYSTADROPS in the refrigerator between 36F to 46F (2C to 8C). Keep the bottle in the outer carton in order to protect from light.After First Opening: After opening, store opened CYSTADROPS at room temperature between 68F to 77F (20C to 25C). Do not refrigerate after opening. Keep the dropper bottle tightly closed in the outer carton in order to protect from light. Discard days after first opening.

INDICATIONS & USAGE SECTION.

1 INDICATIONS AND USAGE. CYSTADROPS is cystine-depleting agent indicated for the treatment of corneal cystine crystal deposits in adults and children with cystinosis. CYSTADROPS is cystine-depleting agent indicated for the treatment of corneal cystine crystal deposits in adults and children with cystinosis. (1).

INFORMATION FOR PATIENTS SECTION.

17 PATIENT COUNSELING INFORMATION. Advise the patient to read the FDA-approved patient labeling (Instructions for Use).Preparation for Administration and Storage of BottlesAdvise patients to store new unopened bottles in the refrigerator in the original carton. Each week, one new bottle should be removed from the refrigerator. Advise patients to write the date the bottle was opened in the space on the carton. After first opening, keep the bottle tightly closed and store at room temperature in the original carton. Patients are to wash their hands carefully in order to avoid microbiological contamination of the content in the bottle. Remove the green protective cap (see Figure A). Remove the metal seal (see Figure B). Remove the gray stopper (see Figure C) from the bottle. Do not touch the opening of the bottle after removing the gray stopper. Take the dropper out of its packaging, without touching the end intended to be attached to the bottle, attach it (see Figure D) to the bottle and do not remove it. Patients should be advised not to lose the small white cap (see Figure E) that comes on the top of the dropper. Keep the small white cap tightly closed when not in use. Instill one drop of CYSTADROPS in each eye, times day during waking hours. Instruct patients to discard the bottle at the end of days. There may be medication left in the bottle; however, the bottle must be discarded by the patient because the medication is only stable for days after first opening. Risk of ContaminationAdvise patients not to touch the eyelid or surrounding areas with the dropper tip of the bottle. The cap should remain on the bottle when not in use. Contact Lens UseAdvise patients that contact lenses should be removed prior to application of CYSTADROPS. Contact lenses may be reinserted 15 minutes following CYSTADROPS administration [see Warnings and Precautions 5.3)]. Topical Ophthalmic UseAdvise patients that CYSTADROPS is for topical ophthalmic use.Missed DoseIf the patient misses an instillation, instruct the patient to administer dose as soon as feasible and then to continue the treatment with the next scheduled instillation.Manufactured by: Baccinex SA, 2822 Courroux, SwitzerlandManufactured for: Recordati Rare Diseases Inc., Lebanon, NJ 08833, U.S.A.This product label may have been updated. For the most recent prescribing information, please visit www.recordatirarediseases.com/us.. Advise patients to store new unopened bottles in the refrigerator in the original carton. Each week, one new bottle should be removed from the refrigerator. Advise patients to write the date the bottle was opened in the space on the carton. After first opening, keep the bottle tightly closed and store at room temperature in the original carton. Patients are to wash their hands carefully in order to avoid microbiological contamination of the content in the bottle. Remove the green protective cap (see Figure A). Remove the metal seal (see Figure B). Remove the gray stopper (see Figure C) from the bottle. Do not touch the opening of the bottle after removing the gray stopper. Take the dropper out of its packaging, without touching the end intended to be attached to the bottle, attach it (see Figure D) to the bottle and do not remove it. Patients should be advised not to lose the small white cap (see Figure E) that comes on the top of the dropper. Keep the small white cap tightly closed when not in use. Instill one drop of CYSTADROPS in each eye, times day during waking hours. Instruct patients to discard the bottle at the end of days. There may be medication left in the bottle; however, the bottle must be discarded by the patient because the medication is only stable for days after first opening.

PREGNANCY SECTION.

8.1 Pregnancy. Risk SummaryThere are no adequate and well-controlled studies of ophthalmic cysteamine in pregnant women to inform any drug associated risks. Oral administration of cysteamine to pregnant rats throughout the period of organogenesis was teratogenic at doses 240 to 960 times the recommended human ophthalmic dose (based on body surface area) [see Data]. CYSTADROPS should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus.The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have background risk of birth defect, loss, or other adverse outcomes In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively.Data Animal dataTeratology studies have been performed in rats at oral doses in the range of 37.5 mg/kg/day to 150 mg/kg/day (240 to 960 times the recommended human ophthalmic dose based on body surface area) and have shown cysteamine bitartrate to be teratogenic. Observed teratogenic findings were intrauterine death, cleft palate, kyphosis, heart ventricular septal defects, microcephaly, exencephaly, and growth deficits.

RENAL IMPAIRMENT SUBSECTION.

8.6 Renal Impairment. The effect of renal impairment on the pharmacokinetics of cysteamine following ophthalmic administration of cysteamine ophthalmic solution has not been evaluated. Clearance of cysteamine from the conjunctival sac of the eye is not dependent on renal function and the total systemic dose is negligible, so impaired renal function is unlikely to affect total body clearance.The total daily ophthalmic dose is less than 4% of the recommended oral daily dose of cysteamine; thus, the systemic exposure following ophthalmic administration is expected to be negligible compared to oral administration.

SPL PATIENT PACKAGE INSERT SECTION.

INSTRUCTIONS FOR USE CYSTADROPS(R) (sys-tah-drops) (cysteamine ophthalmic solution) for topical ophthalmic use Read this Instructions for Use carefully before you start using CYSTADROPS and each time you get refill; there may be new information. This leaflet does not take the place of talking to your healthcare provider about your medical condition or treatment. Important information:o Use CYSTADROPS exactly as your healthcare provider tells you to use it. CYSTADROPS is for use in the eyes.o Wash your hands before each use.o If you use CYSTADROPS with other eye medicines, you should wait at least 10 minutes between using CYSTADROPS and your other eye medicines.o If you wear contact lenses, remove them before using CYSTADROPS. You should wait at least 15 minutes after using CYSTADROPS, before placing your contact lenses back in your eyes.o Do not let the CYSTADROPS dropper touch your eyelids or any other surfaces. Storing CYSTADROPS:o Before opening, store new, unopened CYSTADROPS in the refrigerator between 36F to 46F (2C to 8C).o After first opening, store opened CYSTADROPS at room temperature between 68F to 77F (20C to 25C). Do not refrigerate after opening.o Keep CYSTADROPS in the original carton to protect from light.o Keep the CYSTADROPS dropper bottle tightly closed when not in use.o Throw away any unused CYSTADROPS days after opening.o Keep CYSTADROPS and all medicines out of the reach of children. Supplies needed:o CYSTADROPS bottle and droppero mirroro tissue Using CYSTADROPS:o Use drop in each eye, four times day.o If you miss dose, administer the missed dose as soon as possible and then use the drops at your next regular scheduled time. Step 1: Before using CYSTADROPS bottle for the first timeo Check the expiration date on the CYSTADROPS bottle before use. Do not use CYSTADROPS if the expiration date has passed.o After opening CYSTADROPS bottle, allow it to reach room temperature before using it for the first time.o After opening CYSTADROPS bottle for the first time, write the date of opening in the space provided on the carton.o Wash your hands carefully in order to avoid contamination of the contents in the bottle.o Remove the green protective cap (Figure A).o Remove the metal seal (Figure B).o Remove the gray stopper (Figure C).o Do not touch the opening of the bottle after removing the gray stopper.o Place the opened bottle on flat surface. Take the dropper out of its packaging. Do not touch the end of the dropper that will be attached to the bottle. Attach the dropper (Figure D) to the bottle. After attaching the dropper to the bottle, do not remove the dropper from the bottle (Figure E). Make sure that you do not lose the small white cap (Figure E) that comes on the top of the dropper. Step 2: Before using CYSTADROPSo Check the opening date that you wrote down on the carton. Do not use CYSTADROPS if more than days have passed since the opening date.o Get the CYSTADROPS dropper bottle, mirror, and tissue.o Wash your hands. Step 3: Using the CYSTADROPS dropper bottleo Twist the small white cap to remove it from the dropper. Do not throw the small white cap away. Hold the CYSTADROPS dropper bottle with the dropper pointing down, between your thumb and fingers. If no medicine fills the dropper, move the CYSTADROPS dropper bottle up and down until medicine fills the dropper.o Tilt your head back. Pull down your lower eyelid with clean finger and look up (Figure F). The medicine will go into the space between your lower eyelid and your eye.o Use the mirror to help you bring the dropper bottle tip close to the eye.o Do not let the CYSTADROPS dropper touch your eyelids or any other surfaces.o Gently squeeze the dropper to release drop of CYSTADROPS.o If drop misses your eye, try again.o After using CYSTADROPS, close your eye and press finger into the corner of your eye by the nose (Figure G), then gently massage your upper eyelid to spread the CYSTADROPS over the eye.o Remove any medicine around the eye with tissue (Figure H).o Repeat Step for the other eye.o Replace the small white cap on the dropper immediately after use. This Instructions for Use has been approved by the U.S. Food and Drug Administration. Manufactured by: Baccinex SA, 2822 Courroux, SwitzerlandManufactured for: Recordati Rare Diseases Inc., Lebanon, NJ 08833, U.S.A. Approved: 08/2020.

SPL UNCLASSIFIED SECTION.

2.1 Dosage Information. Instill one drop of CYSTADROPS in each eye, times day during waking hours.Do not touch dropper tip to the eyelids, surrounding areas, or any surface, as this may contaminate the solution.In case of concomitant therapy with other topical ocular products, an interval of 10 minutes should be allowed between successive applications. Eye ointments should be administered last. If the patient misses an instillation, the patient should be told to administer dose as soon as feasible and then continue the treatment with the next scheduled instillation. Discard bottle days after first opening.

USE IN SPECIFIC POPULATIONS SECTION.

8 USE IN SPECIFIC POPULATIONS. 8.1 Pregnancy. Risk SummaryThere are no adequate and well-controlled studies of ophthalmic cysteamine in pregnant women to inform any drug associated risks. Oral administration of cysteamine to pregnant rats throughout the period of organogenesis was teratogenic at doses 240 to 960 times the recommended human ophthalmic dose (based on body surface area) [see Data]. CYSTADROPS should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus.The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have background risk of birth defect, loss, or other adverse outcomes In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively.Data Animal dataTeratology studies have been performed in rats at oral doses in the range of 37.5 mg/kg/day to 150 mg/kg/day (240 to 960 times the recommended human ophthalmic dose based on body surface area) and have shown cysteamine bitartrate to be teratogenic. Observed teratogenic findings were intrauterine death, cleft palate, kyphosis, heart ventricular septal defects, microcephaly, exencephaly, and growth deficits. 8.2 Lactation. Risk SummaryThere is no information regarding the presence of cysteamine in human milk, the effects on the breastfed infants, or the effects on milk production. Cysteamine administered orally is present in milk of lactating rats. It is not known whether measurable levels of cysteamine would be present in maternal milk following topical ocular administration of CYSTADROPS. The developmental and health benefits of breastfeeding should be considered along with the mothers clinical need for CYSTADROPS and any potential adverse effects on the breastfed child from CYSTADROPS or from the underlying maternal conditions. 8.4 Pediatric Use. The safety and effectiveness of CYSTADROPS has been established in pediatric patients. Use of CYSTADROPS is supported by adequate and well controlled trials in pediatric patients and additional experience supporting the safety of CYSTADROPS. 8.5 Geriatric Use. Clinical studies of CYSTADROPS did not include sufficient numbers of subjects aged 65 and over to determine whether they respond differently from younger subjects. Other reported clinical experience has not identified differences in responses between the elderly and younger patients. 8.6 Renal Impairment. The effect of renal impairment on the pharmacokinetics of cysteamine following ophthalmic administration of cysteamine ophthalmic solution has not been evaluated. Clearance of cysteamine from the conjunctival sac of the eye is not dependent on renal function and the total systemic dose is negligible, so impaired renal function is unlikely to affect total body clearance.The total daily ophthalmic dose is less than 4% of the recommended oral daily dose of cysteamine; thus, the systemic exposure following ophthalmic administration is expected to be negligible compared to oral administration.

WARNINGS AND PRECAUTIONS SECTION.

5 WARNINGS AND PRECAUTIONS. To minimize the risk of contamination, do not touch the dropper tip to any surface. Keep bottle tightly closed when not in use. (5.1). 5.1 Contamination of Tip and Solution. To minimize contaminating the dropper tip and solution, care should be taken not to touch the eyelids or surrounding areas with the dropper tip of the bottle. Keep bottle tightly closed when not in use.. 5.2 Benign Intracranial Hypertension. There have been reports of benign intracranial hypertension (or pseudotumor cerebri) associated with oral cysteamine treatment that has resolved with the addition of diuretic therapy. There have also been reports associated with ophthalmic use of cysteamine; however, all of these patients were on concurrent oral cysteamine.. 5.3 Contact Lens Use. CYSTADROPS contains benzalkonium chloride, which may be absorbed by soft contact lenses. Contact with soft contact lenses should be avoided. Contact lenses should be removed prior to application of solution and may be reinserted 15 minutes following its administration [see Patient Counseling Information (17)].