HYDROXYCHLOROQUINE SULFATE

6 ADVERSE REACTIONS The following adverse reactions are described in greater detail in other sections: Cardiomyopathy and Ventricular Arrhythmias [ see Warnings and Precautions (5.1) ] Retinal Toxicity [ see Warnings and Precautions (5. 2)] Serious Skin Reactions [ see Warnings and Precautions (5.3)] Worsening of Psoriasis [ see Warnings and Precautions (5.4) ] Risks Associated with Use in Porphyria [ see Warnings and Precautions (5.5)] Hematologic Toxicity [ see Warnings and Precautions (5.6) ] Hemolytic Anemia Associated with G6PD [ see Warnings and Precautions (5.7) ] Skeletal Muscle Myopathy or Neuropathy [ see Warnings and Precautions (5.8) ] Neuropsychiatric Reactions Including Suicidality [ see Warnings and Precautions (5.9) ] Hypoglycemia [ see Warnings and Precautions (5.10) ] The following adverse reactions have been identified during post-approval use of 4­aminoquinoline drugs, including hydroxychloroquine sulfate tablets. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure: Blood and lymphatic system disorders : Bone marrow depression, anemia, aplastic anemia, agranulocytosis, leukopenia, thrombocytopenia Cardiac disorders: Cardiomyopathy, cardiac failure, QT-interval prolongation, ventricular tachycardia, torsades de pointes, atrioventricular block, bundle branch block, sick sinus syndrome, pulmonary hypertension Ear and labyrinth disorders: Vertigo, tinnitus, nystagmus, sensorineural hearing loss Eye disorders: Retinopathy, retinal pigmentation changes (typically bull’s eye appearance), visual field defects (paracentral scotomas), macular degeneration, corneal edema, corneal opacities, decreased dark adaptation Gastrointestinal disorders: Nausea, vomiting, diarrhea, abdominal pain General disorders: Fatigue Hepatobiliary disorders: Abnormal liver function tests, fulminant hepatic failure Immune system disorders: Urticaria, angioedema, bronchospasm Metabolism and nutrition disorders: Anorexia, hypoglycemia, weight loss Musculoskeletal and connective tissue disorders: Proximal myopathy, depressed tendon reflexes, abnormal nerve conduction Nervous system disorders: Ataxia, dizziness, headache, seizure, extrapyramidal disorders (dystonia, dyskinesia, tremor) Neuropsychiatric disorders: Affect/emotional lability, irritability, nervousness, psychosis, suicidal ideation, suicidal behavior, depression, hallucinations, anxiety, agitation, confusion, delusions, paranoia, mania and sleep disorders (insomnia, night terrors, nightmares) Skin and subcutaneous tissue disorders: Alopecia, hair color changes, rash, pruritus, photosensitivity, psoriasis exacerbation, hyperpigmentation, exfoliative dermatitis, erythema multiforme, acute generalized exanthematous pustulosis, Drug Rash with Eosinophilia and Systemic Symptoms (DRESS syndrome), Stevens-Johnson syndrome (SJS), toxic epidermal necrolysis (TEN) The most common adverse reactions reported are: nausea, vomiting, diarrhea, and abdominal pain. (6) To report SUSPECTED ADVERSE REACTIONS, contact Appco Pharma LLC at 1-855-672-7726 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

4 CONTRAINDICATIONS Hydroxychloroquine sulfate tablets are contraindicated in patients with known hypersensitivity to 4-aminoquinoline compounds. Patients with hypersensitivity to 4-aminoquinoline compounds (4)

11 DESCRIPTION Hydroxychloroquine sulfate is a white or practically white, crystalline powder, freely soluble in water; practically insoluble in alcohol, chloroform, and in ether. The chemical name for hydroxychloroquine sulfate is 2-[[4-[(7-Chloro-4-quinolyl)amino]pentyl]ethylamino] ethanol sulfate (1:1). Its structural formula is The molecular weight of hydroxychloroquine sulfate is 433.95, and molecular formula is C 18 H 26 CIN 3 O•H 2 SO 4 . Hydroxychloroquine Sulfate Tablets, USP contains 100 mg hydroxychloroquine sulfate, equivalent to 77.5 mg base, and are for oral administration. Inactive Ingredients: corn starch, crospovidone, hydroxypropyl methylcellulose, lactose monohydrate, magnesium stearate, polyethylene glycol, polyvinyl alcohol, talc and titanium dioxide. Hydroxychloroquine Sulfate Tablets, USP contain 200 mg hydroxychloroquine sulfate, equivalent to 155 mg base, and are for oral administration. Inactive Ingredients: corn starch, crospovidone, hydroxypropyl methylcellulose, lactose monohydrate, magnesium stearate, polyethylene glycol, polyvinyl alcohol, talc and titanium dioxide. Hydroxychloroquine Sulfate Tablets, USP contains 300 mg hydroxychloroquine sulfate, equivalent to 232.5 mg base, and are for oral administration. Inactive Ingredients: corn starch, crospovidone, hydroxypropyl methylcellulose, lactose monohydrate, magnesium stearate, polyethylene glycol, polyvinyl alcohol, talc, titanium dioxide and yellow iron oxide. Hydroxychloroquine Sulfate Tablets, USP contain 400 mg hydroxychloroquine sulfate, equivalent to 310 mg base, and are for oral administration. Inactive Ingredients: corn starch, crospovidone, hydroxypropyl methylcellulose, lactose monohydrate, magnesium stearate, polyethylene glycol, polyvinyl alcohol, talc and titanium dioxide. Meets USP Dissolution Test 1 Chemical Structure

2 DOSAGE AND ADMINISTRATION Malaria in Adult and Pediatric Patients (2.2): Prophylaxis: Begin weekly doses 2 weeks prior to travel to the endemic area, continue weekly doses while in the endemic area, and continue the weekly doses for 4 weeks after leaving the endemic area: Adults: 400 mg once a week Pediatric patients ≥ 31 kg: 6.5 mg/kg up to 400 mg, once a week Treatment of Uncomplicated Malaria: See Full Prescribing Information (FPI) for complete dosing information. Rheumatoid Arthritis in Adults (2.3): Initial dosage: 400 mg to 600 mg daily Chronic dosage: 200 mg once daily or 400 mg once daily (or in two divided doses) Systemic Lupus Erythematosus in Adults (2.4): 200 mg once daily or 400 mg once daily (or in two divided doses) Chronic Discoid Lupus Erythematosus in Adults (2.5): 200 mg once daily or 400 mg once daily (or in two divided doses) 2.1 Important Administration Instructions Administer hydroxychloroquine sulfate tablets orally with food or milk. Do not crush or divide the tablets. 2.2 Dosage for Malaria in Adult and Pediatric Patients Hydroxychloroquine sulfate tablets are not recommended in pediatric patients less than 31 kg because the lowest available strength (200 mg) exceeds the recommended dose for these patients and it cannot be divided. Prophylaxis Treatment must start 2 weeks before travel to an endemic area. Advise the patient to take the prophylaxis dosage once a week, staring 2 weeks prior to travel to the endemic area, on the same day every week, continuing the same weekly dose while in the endemic area, and for 4 weeks after leaving the endemic area. The recommended prophylaxis dosage is: Adult patients: 400 mg once a week Pediatric patients ≥ 31kg: 6.5 mg/kg actual body weight (up to 400 mg) once a week Treatment of Uncomplicated Malaria The dosages for the treatment of uncomplicated malaria are: Adult patients: Administer 800 mg initially; subsequently administer 400 mg at 6 hours, 24 hours, and 48 hours after the initial dose (total dosage = 2000 mg). Pediatric patients ≥ 31 kg: Administer 13 mg/kg (up to 800 mg) initially; subsequently administer 6.5 mg/kg (up to 400 mg) at 6 hours, 24 hours, and 48 hours after the initial dose (total dosage = 31 mg/kg - up to 2000 mg). For radical cure of P. vivax and P. ovale infections, concomitant therapy with an 8­-aminoquinoline drug is necessary [ see Microbiology (12.4)] . 2.3 Dosage for Rheumatoid Arthritis in Adults The recommended dosage is: Initial dosage: 400 mg to 600 mg daily as a single daily dose or two divided doses. The action of hydroxychloroquine is cumulative and may require weeks to months for maximum therapeutic effect. Daily doses exceeding 5 mg/kg (actual weight) of hydroxychloroquine sulfate increase the incidence of retinopathy [see Warnings and Precautions (5.2)] . Chronic dosage: 200 mg once daily to 400 mg daily, as a single dose or two divided doses. Corticosteroids, salicylates, and other antirheumatic agents may be used concomitantly with hydroxychloroquine sulfate tablets. 2.4 Dosage for Systemic Lupus Erythematosus in Adults The recommended dosage is 200 mg given once daily, or 400 mg given once daily or in two divided doses. 2.5 Dosage for Chronic Discoid Lupus Erythematosus in Adults The recommended dosage is 200 mg given once daily, or 400 mg given once daily or in two divided doses.

1 INDICATIONS AND USAGE Hydroxychloroquine Sulfate Tablets are an antimalarial and antirheumatic indicated for the: Treatment of uncomplicated malaria due to Plasmodium falciparum, Plasmodium malariae, Plasmodium ovale, and Plasmodium vivax in adult and pediatric patients. (1.1) Prophylaxis of malaria in geographic areas where chloroquine resistance is not reported in adult and pediatric patients. (1.1) Treatment of rheumatoid arthritis in adults. (1.2) Treatment of systemic lupus erythematosus in adults. (1.3) Treatment of chronic discoid lupus erythematosus in adults. (1.4) Limitations of Use (1.1): Hydroxychloroquine Sulfate Tablets are not recommended for the: Treatment of complicated malaria. Treatment of chloroquine or hydroxychloroquine-resistant strains of Plasmodium species. Treatment of malaria acquired in geographic areas where chloroquine resistance occurs or when the Plasmodium species has not been identified. Prophylaxis of malaria in geographic areas where chloroquine resistance occurs. Prevention of relapses of P. vivax or P. ovale because it is not active against the hypnozoite liver stage forms of these parasites. For radical cure of P. vivax and P. ovale infections, concomitant therapy with an 8-aminoquinoline drug is necessary. 1.1 Malaria Hydroxychloroquine sulfate tablets are indicated in adult and pediatric patients for the: Treatment of uncomplicated malaria due to Plasmodium falciparum, Plasmodium malariae, Plasmodium vivax, and Plasmodium ovale . Prophylaxis of malaria in geographic areas where chloroquine resistance is not reported. Limitations of Use: Hydroxychloroquine sulfate tablets are not recommended for: Treatment of complicated malaria. Treatment of malaria by chloroquine or hydroxychloroquine-resistant strains of Plasmodium species [see Microbiology(12.4)] . Treatment of malaria acquired in geographic areas where chloroquine resistance occurs or when the Plasmodium species has not been identified. Prophylaxis of malaria in geographic areas where chloroquine resistance occurs. Prevention of relapses of P. vivax or P. ovale because it is not active against the hypnozoite liver stage forms of these parasites. For radical cure of P. vivax and P. ovale infections, concomitant therapy with an 8-aminoquinoline drug is necessary [ see Microbiology (12.4)]. For the most current information about drug resistance, refer to the latest recommendations from the Center for Disease Control and Prevention 1 . 1.2 Rheumatoid Arthritis Hydroxychloroquine sulfate tablets are indicated for the treatment of acute and chronic rheumatoid arthritis in adults. 1.3 Systemic Lupus Erythematosus Hydroxychloroquine sulfate tablets are indicated for the treatment of systemic lupus erythematosus in adults. 1.4 Chronic Discoid Lupus Erythematosus Hydroxychloroquine sulfate tablets are indicated for the treatment of chronic discoid lupus erythematosus in adults.

10 OVERDOSAGE Hydroxychloroquine sulfate tablets overdosage symptoms have an onset within 1 to 3 hours of ingestion. The following have been reported with hydroxychloroquine sulfate tablets overdosage: Cardiovascular toxicity, including QRS or QTc prolongation, ventricular tachycardia, ventricular fibrillation, torsade de pointes, atrioventricular block, cardiac arrest and death. Life-threatening hypotension is common. Severe hypokalemia secondary to an intracellular shift is common in severe toxicity. Central nervous system (CNS) depression, seizures, visual disturbances, transient blindness, and coma may occur. Gastrointestinal decontamination procedures warrant consideration in patients that present within the first hour post-ingestion. If the level of consciousness rapidly deteriorates in severe poisoning, consider intubation before gastrointestinal decontamination procedures. Monitor plasma potassium levels and manage accordingly. Hemofiltration, hemodialysis, and hemoperfusion are not of benefit. Consider contacting a poison center (1-800-221-2222) or a medical toxicologist for overdosage management recommendations.

7 DRUG INTERACTIONS Drugs Prolonging QT Interval and Other Arrhythmogenic Drugs. (7.1) See FPI for more important drug interactions. (7) 7.1 Drugs Prolonging QT Interval and Other Arrhythmogenic Drugs Hydroxychloroquine sulfate tablets prolongs the QT interval. There may be an increased risk of inducing ventricular arrhythmias if hydroxychloroquine sulfate tablets is used concomitantly with other arrhythmogenic drugs. Therefore, hydroxychloroquine sulfate tablets are not recommended in patients taking other drugs that have the potential to prolong the QT interval or are arrhythmogenic [ see Warnings and Precautions (5.1]. 7.2 Insulin or Other Antidiabetic Drugs Hydroxychloroquine sulfate tablets may enhance the effects of insulin and antidiabetic drugs, and consequently increase the hypoglycemic risk. Therefore, a decrease in dosage of insulin and other antidiabetic drugs may be necessary [ see Warnings and Precautions (5.10) ]. 7.3 Drugs that Lower the Seizure Threshold Hydroxychloroquine sulfate tablets can lower the seizure threshold. Co-administration of hydroxychloroquine sulfate tablets with other antimalarials known to lower the seizure threshold (e.g., mefloquine) may increase the risk of seizures. 7.4 Antiepileptics The activity of antiepileptic drugs might be impaired if co-administered with hydroxychloroquine sulfate tablets. 7.5 Methotrexate Concomitant use of hydroxychloroquine sulfate tablets and methotrexate may increase the incidence of adverse reactions. 7.6 Cyclosporine An increased plasma cyclosporin level was reported when cyclosporin and hydroxychloroquine sulfate tablets were co-administered. Monitor serum cyclosporine levels closely in patients receiving combined therapy. 7.7 Digoxin Concomitant hydroxychloroquine sulfate tablets and digoxin therapy may result in increased serum digoxin levels. Monitor serum digoxin levels closely in patients receiving combined therapy. 7.8 Cimetidine Concomitant use of cimetidine resulted in a 2-fold increase of exposure of chloroquine, which is structurally related to hydroxychloroquine. Interaction of cimetidine with hydroxychloroquine cannot be ruled out. Avoid concomitant use of cimetidine. 7.9 Rifampicin Lack of efficacy of hydroxychloroquine was reported when rifampicin was concomitantly administered. Avoid concomitant use of rifampicin. 7.10 Praziquantel Chloroquine has been reported to reduce the bioavailability of praziquantel. Interaction of praziquantel with hydroxychloroquine cannot be ruled out. 7.11 Antacids and kaolin Antacids and kaolin can reduce absorption of chloroquine; an interval of at least 4 hours between intake of these agents and chloroquine should be observed. Interaction of antacids and kaolin with hydroxychloroquine cannot be ruled out. 7.12 Ampicillin In a study of healthy volunteers, chloroquine significantly reduced the bioavailability of ampicillin. Interaction of ampicillin with hydroxychloroquine cannot be ruled out.

12 CLINICAL PHARMACOLOGY 12.1 Mechanism of Action Malaria Hydroxychloroquine is a 4-aminoquinoline antimalarial [ see Microbiology (12.4) ] and antirheumatic agent. Rheumatoid Arthritis, Systemic Lupus Erythematosus and Chronic Discoid Lupus Erythematosus The mechanisms underlying the anti-inflammatory and immunomodulatory effects of hydroxychloroquine sulfate tablets in the treatment of rheumatoid arthritis, chronic discoid lupus erythematosus and systemic lupus erythematosus are not fully known. 12.2 Pharmacodynamics The exposure-response relationship and time course of pharmacodynamic response for the safety and effectiveness of hydroxychloroquine have not been fully characterized. 12.3 Pharmacokinetics Absorption Following a single 200 mg oral dose of hydroxychloroquine sulfate tablets to healthy male volunteers, whole blood hydroxychloroquine Cmax was 129.6 ng/mL (plasma Cmax was 50.3 ng/mL) with Tmax of 3.3 hours (plasma Tmax 3.7 hours). Following a single oral hydroxychloroquine sulfate tablets dose of 200 mg, the mean fraction of the dose absorbed was 0.74 (compared to administration of 155 mg of hydroxychloroquine intravenous infusion). Peak blood concentrations of metabolites were observed at the same time as peak levels of hydroxychloroquine. After administration of single 155 mg and 310 mg intravenous doses, peak blood concentrations ranged from 1161 ng/mL to 2436 ng/mL (mean 1918 ng/mL) following the 155 mg infusion and 6 months following the 310 mg infusion. Pharmacokinetic parameters were not significantly different over the therapeutic dose range of 155 mg and 310 mg indicating linear kinetics. In patients with rheumatoid arthritis, there was large variability as to the fraction of the dose absorbed (i.e. 30 to 100%), and mean hydroxychloroquine levels were significantly higher in patients with less disease activity. Distribution Hydroxychloroquine sulfate tablets is extensively distributed to tissues. Elimination A half-life of 123.5 days in plasma were observed following a single 200 mg oral hydroxychloroquine sulfate tablets dose to healthy male volunteers. Urine hydroxychloroquine levels were still detectable after 3 months with approximately 10% of the dose excreted as the parent drug. Results following a single dose of a 200 mg tablet versus i.v. infusion (155 mg), demonstrated a half-life of about 40 days and a large volume of distribution. Following chronic oral administration of hydroxychloroquine, the absorption half-life was approximately 3 to 4 hours and the terminal half-life ranged from 40 to 50 days. Metabolism Significant levels of three metabolites, desethylhydroxychloroquine (DHCQ), desethylchloroquine (DCQ), and bidesethylhydroxychloroquine (BDCQ) were found in plasma and blood, with DHCQ being the major metabolite. Excretion Renal clearance in patients with rheumatoid arthritis treated with hydroxychloroquine sulfate tablets for at least 6 months was similar to that in single dose studies in healthy volunteers, suggesting that no change in clearance occurred with chronic dosing. Renal clearance of unchanged drug was approximately 16% to 30%. 12.4 Microbiology Mechanism of Action in Malaria The precise mechanism by which hydroxychloroquine exhibits activity against Plasmodium is not known. Hydroxychloroquine is a weak base and may exert its effect by concentrating in the acid vesicles of the parasite and inhibiting polymerization of heme. It can also inhibit certain enzymes by its interaction with DNA. Antimicrobial Activity Hydroxychloroquine is active against the erythrocytic forms of chloroquine sensitive strains of P. falciparum, P. malariae, P. vivax, and P. ovale . Hydroxychloroquine is not active against the gametocytes and exoerythrocytic forms including the hypnozoite liver stage forms of P. vivax and P. ovale . Drug Resistance P. falciparum strains exhibiting reduced susceptibility to chloroquine also show reduced susceptibility to hydroxychloroquine. Resistance of Plasmodium parasites to chloroquine is widespread [see Indications and Usage (1.1)].

12.1 Mechanism of Action Malaria Hydroxychloroquine is a 4-aminoquinoline antimalarial [ see Microbiology (12.4) ] and antirheumatic agent. Rheumatoid Arthritis, Systemic Lupus Erythematosus and Chronic Discoid Lupus Erythematosus The mechanisms underlying the anti-inflammatory and immunomodulatory effects of hydroxychloroquine sulfate tablets in the treatment of rheumatoid arthritis, chronic discoid lupus erythematosus and systemic lupus erythematosus are not fully known.

12.2 Pharmacodynamics The exposure-response relationship and time course of pharmacodynamic response for the safety and effectiveness of hydroxychloroquine have not been fully characterized.

12.3 Pharmacokinetics Absorption Following a single 200 mg oral dose of hydroxychloroquine sulfate tablets to healthy male volunteers, whole blood hydroxychloroquine Cmax was 129.6 ng/mL (plasma Cmax was 50.3 ng/mL) with Tmax of 3.3 hours (plasma Tmax 3.7 hours). Following a single oral hydroxychloroquine sulfate tablets dose of 200 mg, the mean fraction of the dose absorbed was 0.74 (compared to administration of 155 mg of hydroxychloroquine intravenous infusion). Peak blood concentrations of metabolites were observed at the same time as peak levels of hydroxychloroquine. After administration of single 155 mg and 310 mg intravenous doses, peak blood concentrations ranged from 1161 ng/mL to 2436 ng/mL (mean 1918 ng/mL) following the 155 mg infusion and 6 months following the 310 mg infusion. Pharmacokinetic parameters were not significantly different over the therapeutic dose range of 155 mg and 310 mg indicating linear kinetics. In patients with rheumatoid arthritis, there was large variability as to the fraction of the dose absorbed (i.e. 30 to 100%), and mean hydroxychloroquine levels were significantly higher in patients with less disease activity. Distribution Hydroxychloroquine sulfate tablets is extensively distributed to tissues. Elimination A half-life of 123.5 days in plasma were observed following a single 200 mg oral hydroxychloroquine sulfate tablets dose to healthy male volunteers. Urine hydroxychloroquine levels were still detectable after 3 months with approximately 10% of the dose excreted as the parent drug. Results following a single dose of a 200 mg tablet versus i.v. infusion (155 mg), demonstrated a half-life of about 40 days and a large volume of distribution. Following chronic oral administration of hydroxychloroquine, the absorption half-life was approximately 3 to 4 hours and the terminal half-life ranged from 40 to 50 days. Metabolism Significant levels of three metabolites, desethylhydroxychloroquine (DHCQ), desethylchloroquine (DCQ), and bidesethylhydroxychloroquine (BDCQ) were found in plasma and blood, with DHCQ being the major metabolite. Excretion Renal clearance in patients with rheumatoid arthritis treated with hydroxychloroquine sulfate tablets for at least 6 months was similar to that in single dose studies in healthy volunteers, suggesting that no change in clearance occurred with chronic dosing. Renal clearance of unchanged drug was approximately 16% to 30%.

20230818

13

3 DOSAGE FORMS AND STRENGTHS 100 mg: Hydroxychloroquine Sulfate Tablets, USP are white to off-white, capsule shaped film-coated tablets debossed with “A1” on one side and plain on the other side. 200 mg: Hydroxychloroquine Sulfate Tablets, USP are white to off-white capsule shaped film-coated tablets debossed with “AC 384” on one side and plain on the other side. 300 mg: Hydroxychloroquine Sulfate Tablets, USP are yellow to pale yellow colored, capsule shaped, film-coated tablets debossed with “A3” on one side and plain on the other side. 400 mg: Hydroxychloroquine Sulfate Tablets, USP are white to off-white, capsule shaped, film-coated tablets debossed with “A4” on one side and plain on the other side. Tablets: 100 mg, 200 mg, 300 mg and 400 mg of hydroxychloroquine sulfate (3)

HYDROXYCHLOROQUINE SULFATE HYDROXYCHLOROQUINE SULFATE HYDROXYCHLOROQUINE SULFATE HYDROXYCHLOROQUINE CROSPOVIDONE, UNSPECIFIED HYPROMELLOSE, UNSPECIFIED LACTOSE MONOHYDRATE MAGNESIUM STEARATE POLYETHYLENE GLYCOL, UNSPECIFIED POLYVINYL ALCOHOL, UNSPECIFIED STARCH, CORN TALC TITANIUM DIOXIDE White to off-white Capsule Shaped AC;384 HYDROXYCHLOROQUINE SULFATE HYDROXYCHLOROQUINE SULFATE HYDROXYCHLOROQUINE SULFATE HYDROXYCHLOROQUINE CROSPOVIDONE, UNSPECIFIED HYPROMELLOSE, UNSPECIFIED LACTOSE MONOHYDRATE MAGNESIUM STEARATE POLYETHYLENE GLYCOL, UNSPECIFIED POLYVINYL ALCOHOL, UNSPECIFIED STARCH, CORN TALC TITANIUM DIOXIDE white to off-white Capsule shaped A1 HYDROXYCHLOROQUINE SULFATE HYDROXYCHLOROQUINE SULFATE HYDROXYCHLOROQUINE SULFATE HYDROXYCHLOROQUINE CROSPOVIDONE, UNSPECIFIED HYPROMELLOSE, UNSPECIFIED LACTOSE MONOHYDRATE MAGNESIUM STEARATE POLYETHYLENE GLYCOL, UNSPECIFIED POLYVINYL ALCOHOL, UNSPECIFIED STARCH, CORN TALC TITANIUM DIOXIDE FERRIC OXIDE YELLOW yellow to pale yellow capsule shaped A3 HYDROXYCHLOROQUINE SULFATE HYDROXYCHLOROQUINE SULFATE HYDROXYCHLOROQUINE SULFATE HYDROXYCHLOROQUINE CROSPOVIDONE, UNSPECIFIED HYPROMELLOSE, UNSPECIFIED LACTOSE MONOHYDRATE MAGNESIUM STEARATE POLYETHYLENE GLYCOL, UNSPECIFIED POLYVINYL ALCOHOL, UNSPECIFIED STARCH, CORN TALC TITANIUM DIOXIDE White to off white Capsule shaped A4

13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility No carcinogenicity or genotoxicity studies have been conducted with hydroxychloroquine. No animal studies have been performed to evaluate the potential effects of hydroxychloroquine on reproduction or development, or to determine potential effects on fertility in males or females.

13 NONCLINICAL TOXICOLOGY 13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility No carcinogenicity or genotoxicity studies have been conducted with hydroxychloroquine. No animal studies have been performed to evaluate the potential effects of hydroxychloroquine on reproduction or development, or to determine potential effects on fertility in males or females.

ANDA210441

HYDROXYCHLOROQUINE SULFATE

HYDROXYCHLOROQUINE SULFATE

43598-721

HUMAN PRESCRIPTION DRUG

ORAL

PACKAGE LABEL.PRINCIPAL DISPLAY PANEL hcqs-spl-100mg100s hcqs-spl-100mg500s 200mg 100ct 500ct hcqs-spl-300mg100s hcqs-spl-300mg500s hydroxychlororquine-spl-400mg100s hydroxychlororquine-spl-400mg500s

Warnings and Precautions, Risks Associated with Use in Porphyria (5.5) 7/2023

17 PATIENT COUNSELING INFORMATION Important Administration Instructions Advise the patient to take hydroxychloroquine sulfate tablets with food or milk and not to crush or divide the tablet. Cardiomyopathy and Ventricular Arrhythmias Inform the patient that serious cardiac effects, life-threatening and fatal cases have been reported with use of hydroxychloroquine sulfate tablets Advise patients to seek medical attention immediately if they experience any symptoms of heart rhythm changes including fast or irregular heartbeat, lightheadedness, dizziness, or syncope [see Warnings and Precautions (5.1)]. Retinal Toxicity Inform the patient that irreversible retinal damage has been observed in some patients with the use of hydroxychloroquine sulfate tablets. Advise patients of the importance of the ophthalmology visits for monitoring their eyes. Instruct patients to seek medical attention promptly if they experience decreased vision or decreased dark adaptation [see Warnings and Precautions (5.2)]. Serious Skin Reactions Inform the patient that severe, life-threatening skin reactions have been reported with the use of hydroxychloroquine sulfate tablets. Advise the patient to seek medical attention immediately if experiencing any of the following signs and symptoms: blisters on the skin, eyes, lips or in the mouth, itching or burning, with or without fever [see Warnings and Precautions (5.3)] . Skeletal Muscle Myopathy or Neuropathy Inform the patient that muscle weakness and atrophy has been reported with hydroxychloroquine sulfate tablets use Advise patients to report to the physician symptoms of muscle weakness [ see Warnings and Precautions (5.8) ]. Neuropsychiatric Reactions Including Suicidality Alert patients to seek medical attention immediately if they experience new or worsening depression, suicidal thoughts, or other mood changes [ see Warnings and Precautions (5.9) ]. Hypoglycemia Inform the patient that hydroxychloroquine sulfate tablets has been associated with severe hypoglycemia. Advise the patient to monitor blood sugar levels if possible and to seek medical attention if experiencing any of the signs and symptoms of hypoglycemia such as sweating, shakiness, weakness, dizziness, tachycardia, nausea, blurred vision, confusion, fainting, or loss of consciousness [ see Warnings and Precautions (5.10) ]. Pregnancy Inform the patient that there is a pregnancy registry that monitors pregnancy outcomes in women exposed to hydroxychloroquine sulfate tablets during pregnancy. Encourage patients to register by contacting 1-877­-311-8972 [ see Use in Specific Populations (8.1)] . Manufactured by: Appco Pharma LLC Piscataway, NJ 08854 USA Manufactured For: Dr. Reddy's Laboratories Inc. Princeton, NJ 08540 USA Revision Date: 08/2023 200266 drl-logo-spl

15 REFERENCES 1 Center for Disease Control and Prevention. Malaria. https://www.cdc.gov/parasites/malaria/index.htm l

8.5 Geriatric Use Clinical trials of hydroxychloroquine sulfate tablets did not include sufficient numbers of patients 65 years of age and older to determine whether they respond differently from younger adult patients. Nevertheless, this drug is known to be substantially excreted by the kidney, and the risk of toxic reactions to this drug may be greater in patients with impaired renal function. In general, dose selection in geriatric patients should start with the lowest recommended dose, taking into consideration the greater frequency of decreased hepatic, renal or cardiac function, and of concomitant disease or other drug therapy.

8.2 Lactation Risk Summary Published lactation data report that hydroxychloroquine is present in human milk at low levels. No adverse reactions have been reported in breastfed infants. No retinal toxicity, ototoxicity, cardiotoxicity, or growth and developmental abnormalities have been observed in children who were exposed to hydroxychloroquine through breastmilk. There is no information on the effect of hydroxychloroquine on milk production. The developmental and health benefits of breastfeeding should be considered along with the mother’s clinical need for hydroxychloroquine sulfate tablets and any potential adverse effects on the breastfed child from hydroxychloroquine sulfate tablets or from the underlying maternal condition.

8.4 Pediatric Use The safety and effectiveness of hydroxychloroquine sulfate tablets have been established in pediatric patients for the treatment of uncomplicated malaria due to P. falciparum, P. malariae, P. vivax, and P. ovale , as well as for the prophylaxis of malaria in geographic areas where chloroquine resistance is not reported. However, this product cannot be directly administered to pediatric patients weighing less than 31 kg because the film-coated tablets cannot be crushed or divided [ see Dosage and Administration (2.1, 2.2)] . The safety and effectiveness of hydroxychloroquine sulfate tablets have not been established in pediatric patients for the treatment of rheumatoid arthritis, chronic discoid lupus erythematosus, or systemic lupus erythematosus.

8.1 Pregnancy Pregnancy Exposure Registry There is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to hydroxychloroquine sulfate tablets during pregnancy. Encourage patients to register by contacting 1-877-311-8972. Risk Summary Prolonged clinical experience over decades of use and available data from published epidemiologic and clinical studies with hydroxychloroquine sulfate tablets use in pregnant women have not identified a drug-associated risk of major birth defects, miscarriage, or adverse maternal, or fetal outcomes (see Data). There are risks to the mother and fetus associated with untreated or increased disease activity from malaria, rheumatoid arthritis, and systemic lupus erythematosus in pregnancy (see Clinical Considerations) . Animal reproduction studies were not conducted with hydroxychloroquine. The estimated background risk of major birth defects and miscarriage for the indicated populations is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the US 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. Clinical Considerations Disease-Associated Maternal and/or Embryo-Fetal Risk Malaria: Malaria during pregnancy increases the risk for adverse pregnancy outcomes, including maternal anemia, prematurity, spontaneous abortion, and stillbirth. Rheumatoid Arthritis: Published data suggest that increased disease activity is associated with the risk of developing adverse pregnancy outcomes in women with rheumatoid arthritis Adverse pregnancy outcomes include preterm delivery (before 37 weeks of gestation), low birth weight (less than 2500 g) infants, and small for gestational age at birth. Systemic Lupus Erythematosus: Pregnant women with systemic lupus erythematosus, especially those with increased disease activity, are at increased risk of adverse pregnancy outcomes, including spontaneous abortion, fetal death, preeclampsia, preterm birth, and intrauterine growth restriction. Passage of maternal auto-antibodies across the placenta may result in neonatal illness, including neonatal lupus and congenital heart block. Data Human Data Data from published epidemiologic and clinical studies have not established an association with hydroxychloroquine sulfate tablets use during pregnancy and major birth defects, miscarriage, or adverse maternal or fetal outcomes. Hydroxychloroquine readily crosses the placenta with cord blood levels corresponding to maternal plasma levels. No retinal toxicity, ototoxicity, cardiotoxicity, or growth and developmental abnormalities have been observed in children who were exposed to hydroxychloroquine in utero. Available epidemiologic and clinical studies have methodological limitations including small sample size and study design.

8 USE IN SPECIFIC POPULATIONS 8.1 Pregnancy Pregnancy Exposure Registry There is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to hydroxychloroquine sulfate tablets during pregnancy. Encourage patients to register by contacting 1-877-311-8972. Risk Summary Prolonged clinical experience over decades of use and available data from published epidemiologic and clinical studies with hydroxychloroquine sulfate tablets use in pregnant women have not identified a drug-associated risk of major birth defects, miscarriage, or adverse maternal, or fetal outcomes (see Data). There are risks to the mother and fetus associated with untreated or increased disease activity from malaria, rheumatoid arthritis, and systemic lupus erythematosus in pregnancy (see Clinical Considerations) . Animal reproduction studies were not conducted with hydroxychloroquine. The estimated background risk of major birth defects and miscarriage for the indicated populations is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the US 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. Clinical Considerations Disease-Associated Maternal and/or Embryo-Fetal Risk Malaria: Malaria during pregnancy increases the risk for adverse pregnancy outcomes, including maternal anemia, prematurity, spontaneous abortion, and stillbirth. Rheumatoid Arthritis: Published data suggest that increased disease activity is associated with the risk of developing adverse pregnancy outcomes in women with rheumatoid arthritis Adverse pregnancy outcomes include preterm delivery (before 37 weeks of gestation), low birth weight (less than 2500 g) infants, and small for gestational age at birth. Systemic Lupus Erythematosus: Pregnant women with systemic lupus erythematosus, especially those with increased disease activity, are at increased risk of adverse pregnancy outcomes, including spontaneous abortion, fetal death, preeclampsia, preterm birth, and intrauterine growth restriction. Passage of maternal auto-antibodies across the placenta may result in neonatal illness, including neonatal lupus and congenital heart block. Data Human Data Data from published epidemiologic and clinical studies have not established an association with hydroxychloroquine sulfate tablets use during pregnancy and major birth defects, miscarriage, or adverse maternal or fetal outcomes. Hydroxychloroquine readily crosses the placenta with cord blood levels corresponding to maternal plasma levels. No retinal toxicity, ototoxicity, cardiotoxicity, or growth and developmental abnormalities have been observed in children who were exposed to hydroxychloroquine in utero. Available epidemiologic and clinical studies have methodological limitations including small sample size and study design. 8.2 Lactation Risk Summary Published lactation data report that hydroxychloroquine is present in human milk at low levels. No adverse reactions have been reported in breastfed infants. No retinal toxicity, ototoxicity, cardiotoxicity, or growth and developmental abnormalities have been observed in children who were exposed to hydroxychloroquine through breastmilk. There is no information on the effect of hydroxychloroquine on milk production. The developmental and health benefits of breastfeeding should be considered along with the mother’s clinical need for hydroxychloroquine sulfate tablets and any potential adverse effects on the breastfed child from hydroxychloroquine sulfate tablets or from the underlying maternal condition. 8.4 Pediatric Use The safety and effectiveness of hydroxychloroquine sulfate tablets have been established in pediatric patients for the treatment of uncomplicated malaria due to P. falciparum, P. malariae, P. vivax, and P. ovale , as well as for the prophylaxis of malaria in geographic areas where chloroquine resistance is not reported. However, this product cannot be directly administered to pediatric patients weighing less than 31 kg because the film-coated tablets cannot be crushed or divided [ see Dosage and Administration (2.1, 2.2)] . The safety and effectiveness of hydroxychloroquine sulfate tablets have not been established in pediatric patients for the treatment of rheumatoid arthritis, chronic discoid lupus erythematosus, or systemic lupus erythematosus. 8.5 Geriatric Use Clinical trials of hydroxychloroquine sulfate tablets did not include sufficient numbers of patients 65 years of age and older to determine whether they respond differently from younger adult patients. Nevertheless, this drug is known to be substantially excreted by the kidney, and the risk of toxic reactions to this drug may be greater in patients with impaired renal function. In general, dose selection in geriatric patients should start with the lowest recommended dose, taking into consideration the greater frequency of decreased hepatic, renal or cardiac function, and of concomitant disease or other drug therapy. 8.6 Patients with Renal or Hepatic Disease A reduction in the dosage of hydroxychloroquine sulfate tablets may be necessary in patients with hepatic or renal disease.

16 HOW SUPPLIED/STORAGE AND HANDLING 16.1 How Supplied Hydroxychloroquine Sulfate Tablets, USP are white to off-white, capsule shaped film-coated tablets debossed with “A1” on one side and plain on the other side. Each film-coated tablet contains Hydroxychloroquine Sulfate, USP 100 mg (equivalent to 77.5 mg base). Bottles of 100 tablets NDC: 43598-133-01 Bottles of 500 tablets NDC: 43598-133-05 Hydroxychloroquine Sulfate Tablets, USP are white to off-white, capsule shaped film-coated tablet debossed with “AC 384” on one side and plain on the other side. Each film-coated tablet contains Hydroxychloroquine Sulfate, USP 200 mg (equivalent to 155 mg base). Bottles of 100 tablets NDC: 43598-721-01, Bottles of 500 tablets NDC: 43598-721-05 Hydroxychloroquine Sulfate Tablets, USP are yellow to pale yellow colored, capsule shaped, film-coated tablets debossed with “A3” on one side and plain on the other side. Each film-coated tablet contains Hydroxychloroquine Sulfate, USP 300 mg (equivalent to 232.5 mg base). Bottles of 100 tablets NDC: 43598-132-01 Bottles of 500 tablets NDC: 43598-132-05 Hydroxychloroquine Sulfate Tablets, USP are white to off-white, capsule shaped, film-coated tablets debossed with “A4” on one side and plain on the other side. Each film-coated tablet contains Hydroxychloroquine Sulfate, USP 400 mg (equivalent to 310 mg base). Bottles of 100 tablets NDC: 43598-131-01 Bottles of 500 tablets NDC: 43598-131-05 16.2 Storage Dispense in a tight, light-resistant container as defined in the USP/NF. Store at room temperature [20° to 25°C (68° to 77°F), allow for excursions between 15° and 30°C (59° and 86°F)].