Bexarotene

6 ADVERSE REACTIONS The following serious adverse reactions are discussed in greater detail in other sections of the prescribing information: Hyperlipidemia [ see Warnings and Precautions (5.1) ] Pancreatitis [ see Warnings and Precautions (5.2) ] Hepatotoxicity, cholestasis, and hepatic failure [ see Warnings and Precautions (5.3) ] Hypothyroidism [ see Warnings and Precautions (5.4) ] Neutropenia [ see Warnings and Precautions (5.5) ] Cataracts [ see Warnings and Precautions (5.6) ] Vitamin A Supplementation Hazard [ see Warnings and Precautions (5.7) ] Hypoglycemia Risk in Patients with Diabetes Mellitus [ see Warnings and Precautions (5.8) ] Photosensitivity [ see Warnings and Precautions (5.9) ] Laboratory Tests [ see Warnings and Precautions (5.10) ] Drug/Laboratory Test Interactions [ see Warnings and Precautions (5.11) ] The most common adverse reactions (greater than 10%) include: hyperlipidemia, hypercholesteremia, headache, hypothyroidism, asthenia, leukopenia, rash, nausea, infection, peripheral edema, abdominal pain, and dry skin. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Upsher-Smith Laboratories, LLC at 1-855-899-9180 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 the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. The safety of bexarotene has been evaluated in two clinical trials of 152 patients with CTCL who received bexarotene for up to 97 weeks and in 352 patients in other trials. The mean duration of therapy for the 152 patients with CTCL was 166 days. The most common adverse events reported with an incidence of at least 10% in patients with CTCL treated at an initial dose of 300 mg/m 2 /day of bexarotene are shown in Table 2. The events at least possibly related to treatment are lipid abnormalities (elevated triglycerides, elevated total and LDL cholesterol and decreased HDL cholesterol), hypothyroidism, headache, asthenia, rash, leukopenia, anemia, nausea, infection, peripheral edema, abdominal pain, and dry skin. Most adverse events occurred at a greater incidence in patients treated at starting doses of greater than 300 mg/m 2 /day (see Table 2 ). Adverse reactions leading to bexarotene dose reduction or discontinuation in at least two patients were hyperlipemia, neutropenia/leukopenia, diarrhea, fatigue/lethargy, hypothyroidism, headache, liver function test abnormalities, rash, pancreatitis, nausea, anemia, allergic reaction, muscle spasm, pneumonia, and confusion. The NCI Grade 3 and NCI Grade 4 adverse reactions reported in two or more patients with CTCL treated at an initial dose of 300 mg/m 2 /day of bexarotene (see Table 3 ) were hypertriglyceridemia, pruritus, headache, peripheral edema, leukopenia, rash, and hypercholesteremia. Most of these moderately severe or severe adverse events occurred at a higher rate in patients treated at starting doses of greater than 300 mg/m 2 /day than in patients treated at a starting dose of 300 mg/m 2 /day. In patients with CTCL receiving an initial dose of 300 mg/m 2 /day, the incidence of NCI Grade 3 or 4 elevations in triglycerides and total cholesterol was 28% and 25%, respectively (Table 4). In contrast, in patients with CTCL receiving greater than 300 mg/m 2 /day, the incidence of NCI Grade 3 or 4 elevated triglycerides and total cholesterol was 45% and 45%, respectively. Other Grade 3 and 4 laboratory abnormalities are shown in Table 3. In addition to the 152 patients enrolled in the two CTCL trials, 352 patients received bexarotene as monotherapy for various advanced malignancies at doses from 5 mg/m 2 /day to 1000 mg/m 2 /day. The common adverse reactions (incidence greater than 10%) were similar to those seen in patients with CTCL. In the 504 patients (CTCL and non-CTCL) who received bexarotene as monotherapy, drug-related serious adverse reactions that were fatal, in one patient each, were acute pancreatitis, subdural hematoma, and liver failure. In the patients with CTCL receiving an initial dose of 300 mg/m 2 /day of bexarotene, adverse reactions reported at an incidence of less than 10% and not included in Tables 2 to 4 or discussed in other parts of labeling and possibly related to treatment were as follows: Body as a Whole: chills, cellulitis, chest pain, breast pain, sepsis, and monilia infection. Cardiovascular: hemorrhage, hypertension, angina pectoris, right heart failure, syncope, and tachycardia. Digestive: constipation, dry mouth, flatulence, colitis, dyspepsia, cheilitis, gastroenteritis, gingivitis, liver failure, and melena. Hemic and Lymphatic: eosinophilia, thrombocythemia, coagulation time increased, lymphocytosis, and thrombocytopenia. Metabolic and Nutritional: LDH increased, creatinine increased, hypoproteinemia, hyperglycemia, weight decreased, weight increased, and amylase increased. Musculoskeletal: arthralgia, myalgia, bone pain, myasthenia, and arthrosis. Nervous: depression, agitation, ataxia, cerebrovascular accident, confusion, dizziness, hyperesthesia, hypesthesia, and neuropathy. Respiratory: pharyngitis, rhinitis, dyspnea, pleural effusion, bronchitis, cough increased, lung edema, hemoptysis, and hypoxia. Skin and Appendages: skin ulcer, acne, alopecia, skin nodule, macular papular rash, pustular rash, serous drainage, and vesicular bullous rash. Special Senses: dry eyes, conjunctivitis, ear pain, blepharitis, corneal lesion, keratitis, otitis externa, and visual field defect. Urogenital: albuminuria, hematuria, urinary incontinence, urinary tract infection, urinary urgency, dysuria, and kidney function abnormal. Table 2: Adverse Events with Incidence ≥10% in CTCL Trials Initial Assigned Dose Group (mg/m 2 /day) 300 >300 Body System N=84 N=53 Adverse Event Preferred English term coded according to Ligand-modified COSTART 5 Dictionary. , Patients are counted at most once in each AE category. N (%) N (%) Metabolic and Nutritional Disorders Hyperlipemia 66 (79) 42 (79) Hypercholesteremia 27 (32) 33 (62) Lactic dehydrogenase increased 6 (7) 7 (13) Body as a Whole Headache 25 (30) 22 (42) Asthenia 17 (20) 24 (45) Infection 11 (13) 12 (23) Abdominal pain 9 (11) 2 (4) Chills 8 (10) 7 (13) Fever 4 (5) 9 (17) Flu syndrome 3 (4) 7 (13) Back pain 2 (2) 6 (11) Infection bacterial 1 (1) 7 (13) Endocrine Hypothyroidism 24 (29) 28 (53) Skin and Appendages Rash 14 (17) 12 (23) Dry skin 9 (17) 5 (9) Exfoliative dermatitis 8 (10) 15 (28) Alopecia 3 (4) 6 (11) Hemic and Lymphatic System Leukopenia 14 (17) 25 (47) Anemia 5 (6) 13 (25) Hypochromic anemia 3 (4) 7 (13) Digestive System Nausea 13 (16) 4 (8) Diarrhea 6 (7) 22 (42) Vomiting 3 (4) 7 (13) Anorexia 2 (2) 12 (23) Cardiovascular System Peripheral edema 11 (13) 6 (11) Nervous System Insomnia 4 (5) 6 (11) Table 3: Incidence of Moderately Severe and Severe Adverse Events Reported in at Least Two Patients (CTCL Trials) Initial Assigned Dose Group (mg/m 2 /day) 300 (N=84) >300 (N=53) Mod Severe Severe Mod Severe Severe Body System Adverse Event Preferred English term coded according to Ligand-modified COSTART 5 Dictionary. , Patients are counted at most once in each AE category. Patients are classified by the highest severity within each row. N (%) N (%) N (%) N (%) Body as a Whole Asthenia 1 (1) 0 (0) 11 (21) 0 (0) Headache 3 (4) 0 (0) 5 (9) 1 (2) Infection bacterial 1 (1) 0 (0) 0 (0) 2 (4) Cardiovascular System Peripheral edema 2 (2) 1 (1) 0 (0) 0 (0) Digestive System Anorexia 0 (0) 0 (0) 3 (6) 0 (0) Diarrhea 1 (1) 1 (1) 2 (4) 1 (2) Pancreatitis 1 (1) 0 (0) 3 (6) 0 (0) Vomiting 0 (0) 0 (0) 2 (4) 0 (0) Endocrine Hypothyroidism 1 (1) 1 (1) 2 (4) 0 (0) Hemic and Lymphatic System Leukopenia 3 (4) 0 (0) 6 (11) 1 (2) Metabolic and Nutritional Disorders Bilirubinemia 0 (0) 1 (1) 2 (4) 0 (0) Hypercholesteremia 2 (2) 0 (0) 5 (9) 0 (0) Hyperlipemia 16 (19) 6 (7) 17 (32) 5 (9) SGOT/AST increased 0 (0) 0 (0) 2 (4) 0 (0) SGPT/ALT increased 0 (0) 0 (0) 2 (4) 0 (0) Respiratory System Pneumonia 0 (0) 0 (0) 2 (4) 2 (4) Skin and Appendages Exfoliative dermatitis 0 (0) 1 (1) 3 (6) 1 (2) Rash 1 (1) 2 (2) 1 (2) 0 (0) Table 4: Treatment-Emergent Abnormal Laboratory Values in CTCL Trials Initial Assigned Dose (mg/m 2 /day) 300 >300 N=83 Number of patients with at least one analyte value post-baseline. N=53 Grade 3 Adapted from NCI Common Toxicity Criteria, Grade 3 and 4, Version 2.0. Patients are considered to have had a Grade 3 or 4 value if either of the following occurred: a) Value becomes Grade 3 or 4 during the study; b) Value is abnormal at baseline and worsens to Grade 3 or 4 on study, including all values beyond study drug discontinuation, as defined in data handling conventions. Grade 4 Grade 3 Grade 4 Analyte (%) (%) (%) (%) Triglycerides The denominator used to calculate the incidence rates for fasting Total Cholesterol and Triglycerides were N=75 for the 300 mg/m 2 /day initial dose group and N=44 for the >300 mg/m 2 /day initial dose group. 21 7 32 14 Total Cholesterol 19 7 16 30 Alkaline Phosphatase 1 0 0 2 Hyperglycemia 1 0 6 0 Hypocalcemia 1 0 0 0 Hyponatremia 1 0 9 0 SGPT/ALT 1 0 2 2 Hyperkalemia 0 0 2 0 Hypernatremia 0 1 0 0 SGOT/AST 0 0 2 2 Total Bilirubin 0 0 0 2 ANC decreased 12 4 19 8 ALC decreased 7 0 15 0 WBC decreased 4 0 11 0 Hemoglobin decreased 0 0 2 0

4 CONTRAINDICATIONS Pregnancy ( Boxed Warning , 4.1 ) Known hypersensitivity to bexarotene ( 4.2 ) 4.1 Pregnancy Bexarotene can cause fetal harm when administered to a pregnant female. Bexarotene is a member of the retinoid class of drugs that is associated with birth defects in humans and is contraindicated in females who are pregnant. Bexarotene was also teratogenic and caused developmental mortality when administered orally to pregnant rats. If this drug is used during pregnancy or if the patient becomes pregnant while taking this drug, the patient should be advised of the potential risk to a fetus. 4.2 Hypersensitivity Bexarotene capsules are contraindicated in patients with a known serious hypersensitivity to bexarotene or other components of the product.

11 DESCRIPTION Bexarotene capsules are a member of a subclass of retinoids that selectively activate retinoid X receptors (RXRs). These retinoid receptors have biologic activity distinct from that of retinoic acid receptors (RARs). The chemical name of bexarotene is 4-[1-(5,6,7,8-tetrahydro-3,5,5,8,8-pentamethyl-2-naphthalenyl) ethenyl] benzoic acid, and the structural formula is as follows: Bexarotene is an off-white to white powder with a molecular weight of 348.48 and a molecular formula of C 24 H 28 O 2 . It is insoluble in water and slightly soluble in vegetable oils and ethanol, USP. Each bexarotene capsule contains 75 mg of bexarotene for oral administration. It also contains the following inactive ingredients: butylated hydroxyanisole, polyethylene glycol, polysorbate and povidone. The capsule shell contains gelatin, glycerin, sorbitol, titanium dioxide and water. Chemical Structure

2 DOSAGE AND ADMINISTRATION The recommended initial dose of bexarotene is 300 mg/m 2 /day (see Table 1 ). Bexarotene capsules should be taken as a single oral daily dose with a meal. For precautions to prevent pregnancy and birth defects in women of child-bearing potential [ see Use in Specific Populations (8.1) ]. Table 1: Bexarotene Initial Dose Calculation According to Body Surface Area Initial Dose Level (300 mg/m 2 /day) Number of 75 mg Bexarotene Capsules Body Surface Area (m 2 ) Total Daily Dose (mg/day) 0.88 – 1.12 300 4 1.13 – 1.37 375 5 1.38 – 1.62 450 6 1.63 – 1.87 525 7 1.88 – 2.12 600 8 2.13 – 2.37 675 9 2.38 – 2.62 750 10 Recommended initial dose is 300 mg/m 2 /day. ( 2 ) Take bexarotene capsules as a single oral daily dose with a meal. ( 2 ) Dose adjustment: may be adjusted to 200 mg/m 2 /day then to 100 mg/m 2 /day. ( 2 ) Dose Modification Guidelines: The 300 mg/m 2 /day dose level of bexarotene may be adjusted to 200 mg/m 2 /day then to 100 mg/m 2 /day, or temporarily suspended, if necessitated by toxicity. When toxicity is controlled, doses may be carefully readjusted upward. If there is no tumor response after eight weeks of treatment and if the initial dose of 300 mg/m 2 /day is well tolerated, the dose may be escalated to 400 mg/m 2 /day with careful monitoring. Duration of Therapy: In clinical trials in CTCL, bexarotene was administered for up to 97 weeks. Bexarotene capsules should be continued as long as the patient is deriving benefit.

1 INDICATIONS AND USAGE Bexarotene capsules are indicated for the treatment of cutaneous manifestations of cutaneous T-cell lymphoma in patients who are refractory to at least one prior systemic therapy. Bexarotene capsules are a retinoid indicated for the treatment of cutaneous manifestations of cutaneous T-cell lymphoma in patients who are refractory to at least one prior systemic therapy. ( 1 )

10 OVERDOSAGE Doses up to 1000 mg/m 2 /day of bexarotene have been administered in short-term trials in patients with advanced cancer without acute toxic effects. Single doses of 1500 mg/kg and 720 mg/kg were tolerated without significant toxicity in rats and dogs, respectively. These doses are approximately 30 and 50 times, respectively, the recommended human dose on a mg/m 2 basis.

7 DRUG INTERACTIONS Effect of Other Drugs on Bexarotene Gemfibrozil: Concomitant administration of bexarotene and gemfibrozil resulted in increases in plasma concentrations of bexarotene. Concomitant administration of gemfibrozil with bexarotene is not recommended. Effect of Bexarotene on Other Drugs Bexarotene may be an inducer for the CYP3A4 enzymes, and may reduce plasma concentrations of other substrates metabolized by CYP3A4. Drug products which may be affected include oral or other systemic hormonal contraceptives. Thus, if treatment with bexarotene is intended for a female with reproductive potential, it is strongly recommended that a non-hormonal contraception be considered [ see Use in Specific Populations (8.3) , Clinical Pharmacology (12.3) ]. Laboratory Test Interference CA125 assay values in patients with ovarian cancer may be increased by bexarotene therapy.

12 CLINICAL PHARMACOLOGY 12.1 Mechanism of Action Bexarotene selectively binds and activates retinoid X receptor subtypes (RXRα, RXRβ, RXRγ). RXRs can form heterodimers with various receptor partners such as retinoic acid receptors (RARs), vitamin D receptor, thyroid receptor, and peroxisome proliferator activator receptors (PPARs). Once activated, these receptors function as transcription factors that regulate the expression of genes that control cellular differentiation and proliferation. Bexarotene inhibits the growth in vitro of some tumor cell lines of hematopoietic and squamous cell origin. It also induces tumor regression in vivo in some animal models. The exact mechanism of action of bexarotene in the treatment of cutaneous T-cell lymphoma (CTCL) is unknown. 12.3 Pharmacokinetics Terminal half-life of bexarotene is approximately seven hours. Studies in patients with advanced malignancies show approximate single dose linearity within the therapeutic range. Absorption After oral administration of bexarotene capsules, bexarotene is absorbed with a T max of about two hours. Plasma bexarotene AUC and C max values resulting from a 75 to 300 mg dose were 35% and 48% higher, respectively, after a fat-containing meal than after a glucose solution. Distribution Bexarotene is highly bound (>99%) to plasma proteins. The plasma proteins to which bexarotene binds have not been elucidated, and the ability of bexarotene to displace drugs bound to plasma proteins and the ability of drugs to displace bexarotene binding have not been studied. Elimination Metabolism Four bexarotene metabolites have been identified in plasma: 6- and 7-hydroxy-bexarotene and 6- and 7-oxo-bexarotene. In vitro studies suggest that cytochrome P450 3A4 is the major cytochrome P450 responsible for formation of the oxidative metabolites and that the oxidative metabolites may be glucuronidated. The oxidative metabolites are active in in vitro assays of retinoid receptor activation, but the relative contribution of the parent and any metabolites to the efficacy and safety of bexarotene is unknown. Excretion The renal elimination of bexarotene and its metabolites was examined in patients with Type 2 diabetes mellitus. Urinary elimination of bexarotene and its known metabolites is a minor excretory pathway (<1% of administered dose). Pharmacokinetics in Specific Populations Age: Based on the population pharmacokinetic analysis of data for 232 patients aged ≥65 years and 343 patients aged <65 years, age has no statistically significant effect on bexarotene pharmacokinetics. Body Weight and Gender: Based on the population pharmacokinetics analysis of data for 614 patients with a weight range of 26 to 145 kg, the bexarotene apparent clearance increases with increasing body weight. Gender has no statistically significant effect on bexarotene pharmacokinetics. Race: Based on the population pharmacokinetic analysis of data for 540 Caucasian and 44 Black patients, bexarotene pharmacokinetics are similar in Blacks and Caucasians. There are insufficient data to evaluate potential differences in the pharmacokinetics of bexarotene for other races. Renal Impairment: No formal studies have been conducted with bexarotene in patients with renal impairment. Urinary elimination of bexarotene and its known metabolites is a minor excretory pathway (<1% of administered dose), but because renal impairment can result in significant protein binding changes, pharmacokinetics may be altered in patients with renal impairment. Hepatic Impairment: No specific studies have been conducted with bexarotene in patients with hepatic impairment. Because less than 1% of the dose is excreted in the urine unchanged and there is in vitro evidence of extensive hepatic contribution to bexarotene elimination, hepatic impairment would be expected to lead to greatly decreased clearance. Drug Interactions Effect of Other Drugs on Bexarotene CYP3A4 Inhibitors/Inducers: In a clinical study, concomitant administration of multiple doses of ketoconazole with bexarotene did not alter bexarotene plasma concentrations. This suggests that bexarotene elimination is not dependent on CYP3A4 metabolism. Paclitaxel plus Carboplatin: The coadministration of paclitaxel (200 mg/m 2 IV dose over 3 hours) plus carboplatin (at a dose expected to achieve an AUC of 6 mg∙min/mL) with bexarotene (400 mg/m 2 orally once daily) increased the exposure to bexarotene (AUC 0–24 and C max ) by 2-fold compared to bexarotene alone . Atorvastatin: Bexarotene concentrations were not affected by concomitant atorvastatin administration. Effect of Bexarotene on Other Drugs Bexarotene did not significantly inhibit the following enzymes in human liver microsomes: CYP1A2, CYP2A6, CYP2C9, CYP2C19, CYP2D6, CYP2E1 and CYP3A4. In vitro data suggested a potential for bexarotene to inhibit CYP2C8 and induce CYP3A4. Atorvastatin: The exposure (AUC) to atorvastatin (a substrate for CYP3A4) decreased by half when atorvastatin was coadministered with bexarotene (400 mg/m 2 orally once daily). Tamoxifen: Based on interim data, concomitant administration of bexarotene and tamoxifen resulted in approximately a 35% decrease in plasma concentrations of tamoxifen, possibly through induction of CYP3A4 by bexarotene. Paclitaxel: The exposure (AUC) to paclitaxel (a substrate for CYP3A4 and CYP2C8) decreased by 19% when paclitaxel (200 mg/m 2 IV dose over 3 hours) was coadministered with bexarotene (400 mg/m 2 orally once daily). Carboplatin: The coadministration of bexarotene (400 mg/m 2 orally once daily) had no effect on the exposure to free or total carboplatin.

12.1 Mechanism of Action Bexarotene selectively binds and activates retinoid X receptor subtypes (RXRα, RXRβ, RXRγ). RXRs can form heterodimers with various receptor partners such as retinoic acid receptors (RARs), vitamin D receptor, thyroid receptor, and peroxisome proliferator activator receptors (PPARs). Once activated, these receptors function as transcription factors that regulate the expression of genes that control cellular differentiation and proliferation. Bexarotene inhibits the growth in vitro of some tumor cell lines of hematopoietic and squamous cell origin. It also induces tumor regression in vivo in some animal models. The exact mechanism of action of bexarotene in the treatment of cutaneous T-cell lymphoma (CTCL) is unknown.

12.3 Pharmacokinetics Terminal half-life of bexarotene is approximately seven hours. Studies in patients with advanced malignancies show approximate single dose linearity within the therapeutic range. Absorption After oral administration of bexarotene capsules, bexarotene is absorbed with a T max of about two hours. Plasma bexarotene AUC and C max values resulting from a 75 to 300 mg dose were 35% and 48% higher, respectively, after a fat-containing meal than after a glucose solution. Distribution Bexarotene is highly bound (>99%) to plasma proteins. The plasma proteins to which bexarotene binds have not been elucidated, and the ability of bexarotene to displace drugs bound to plasma proteins and the ability of drugs to displace bexarotene binding have not been studied. Elimination Metabolism Four bexarotene metabolites have been identified in plasma: 6- and 7-hydroxy-bexarotene and 6- and 7-oxo-bexarotene. In vitro studies suggest that cytochrome P450 3A4 is the major cytochrome P450 responsible for formation of the oxidative metabolites and that the oxidative metabolites may be glucuronidated. The oxidative metabolites are active in in vitro assays of retinoid receptor activation, but the relative contribution of the parent and any metabolites to the efficacy and safety of bexarotene is unknown. Excretion The renal elimination of bexarotene and its metabolites was examined in patients with Type 2 diabetes mellitus. Urinary elimination of bexarotene and its known metabolites is a minor excretory pathway (<1% of administered dose). Pharmacokinetics in Specific Populations Age: Based on the population pharmacokinetic analysis of data for 232 patients aged ≥65 years and 343 patients aged <65 years, age has no statistically significant effect on bexarotene pharmacokinetics. Body Weight and Gender: Based on the population pharmacokinetics analysis of data for 614 patients with a weight range of 26 to 145 kg, the bexarotene apparent clearance increases with increasing body weight. Gender has no statistically significant effect on bexarotene pharmacokinetics. Race: Based on the population pharmacokinetic analysis of data for 540 Caucasian and 44 Black patients, bexarotene pharmacokinetics are similar in Blacks and Caucasians. There are insufficient data to evaluate potential differences in the pharmacokinetics of bexarotene for other races. Renal Impairment: No formal studies have been conducted with bexarotene in patients with renal impairment. Urinary elimination of bexarotene and its known metabolites is a minor excretory pathway (<1% of administered dose), but because renal impairment can result in significant protein binding changes, pharmacokinetics may be altered in patients with renal impairment. Hepatic Impairment: No specific studies have been conducted with bexarotene in patients with hepatic impairment. Because less than 1% of the dose is excreted in the urine unchanged and there is in vitro evidence of extensive hepatic contribution to bexarotene elimination, hepatic impairment would be expected to lead to greatly decreased clearance. Drug Interactions Effect of Other Drugs on Bexarotene CYP3A4 Inhibitors/Inducers: In a clinical study, concomitant administration of multiple doses of ketoconazole with bexarotene did not alter bexarotene plasma concentrations. This suggests that bexarotene elimination is not dependent on CYP3A4 metabolism. Paclitaxel plus Carboplatin: The coadministration of paclitaxel (200 mg/m 2 IV dose over 3 hours) plus carboplatin (at a dose expected to achieve an AUC of 6 mg∙min/mL) with bexarotene (400 mg/m 2 orally once daily) increased the exposure to bexarotene (AUC 0–24 and C max ) by 2-fold compared to bexarotene alone . Atorvastatin: Bexarotene concentrations were not affected by concomitant atorvastatin administration. Effect of Bexarotene on Other Drugs Bexarotene did not significantly inhibit the following enzymes in human liver microsomes: CYP1A2, CYP2A6, CYP2C9, CYP2C19, CYP2D6, CYP2E1 and CYP3A4. In vitro data suggested a potential for bexarotene to inhibit CYP2C8 and induce CYP3A4. Atorvastatin: The exposure (AUC) to atorvastatin (a substrate for CYP3A4) decreased by half when atorvastatin was coadministered with bexarotene (400 mg/m 2 orally once daily). Tamoxifen: Based on interim data, concomitant administration of bexarotene and tamoxifen resulted in approximately a 35% decrease in plasma concentrations of tamoxifen, possibly through induction of CYP3A4 by bexarotene. Paclitaxel: The exposure (AUC) to paclitaxel (a substrate for CYP3A4 and CYP2C8) decreased by 19% when paclitaxel (200 mg/m 2 IV dose over 3 hours) was coadministered with bexarotene (400 mg/m 2 orally once daily). Carboplatin: The coadministration of bexarotene (400 mg/m 2 orally once daily) had no effect on the exposure to free or total carboplatin.

20230331

3

3 DOSAGE FORMS AND STRENGTHS Capsules: 75 mg, off-white, oblong soft gelatin capsules, imprinted with black ink " US285". Capsules: 75 mg ( 3 )

Bexarotene Bexarotene Bexarotene Bexarotene butylated hydroxyanisole polyethylene glycol, unspecified polysorbate 20 povidone, unspecified gelatin type b bovine (230 bloom) glycerin sorbitol titanium dioxide water Off-White US285

13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility Long-term studies in animals to assess the carcinogenic potential of bexarotene have not been conducted. Bexarotene is not mutagenic to bacteria (Ames assay) or mammalian cells (mouse lymphoma assay). Bexarotene was not clastogenic in vivo (micronucleus test in mice). No formal fertility studies were conducted with bexarotene. Bexarotene caused testicular degeneration when oral doses of 1.5 mg/kg/day were given to dogs for 91 days (producing an AUC of approximately one fifth the AUC at the recommended human daily dose).

13 NONCLINICAL TOXICOLOGY 13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility Long-term studies in animals to assess the carcinogenic potential of bexarotene have not been conducted. Bexarotene is not mutagenic to bacteria (Ames assay) or mammalian cells (mouse lymphoma assay). Bexarotene was not clastogenic in vivo (micronucleus test in mice). No formal fertility studies were conducted with bexarotene. Bexarotene caused testicular degeneration when oral doses of 1.5 mg/kg/day were given to dogs for 91 days (producing an AUC of approximately one fifth the AUC at the recommended human daily dose).

ANDA209886

Bexarotene

Bexarotene

0832-0285

HUMAN PRESCRIPTION DRUG

ORAL

PRINCIPAL DISPLAY PANEL - 75 mg Capsule Bottle Label NDC 0832-0285-00 Bexarotene Capsules 75 mg 100 Capsules Rx only UPSHER-SMITH PRINCIPAL DISPLAY PANEL - 75 mg Capsule Bottle Label

Manufactured for UPSHER-SMITH LABORATORIES, LLC Maple Grove, MN 55369 Made in New Zealand Revised 0617

17 PATIENT COUNSELING INFORMATION Advise the patient to read the FDA-approved patient labeling (Patient Information). Inform the patient or caregiver about the following: Birth Defects Advise patients that bexarotene is contraindicated in pregnancy [ see Contraindications (4.1) ]. Bexarotene is a member of the retinoid class of drugs that is associated with birth defects in humans [ see Use in Specific Populations (8.1) ]. Advise females of reproductive potential that they must avoid pregnancy while taking bexarotene and for at least one month following discontinuation of therapy. Advise females of reproductive potential of the importance of monthly pregnancy testing while taking bexarotene. Advise females of reproductive potential to use effective contraception for one month prior to the initiation of therapy, during therapy, and for at least one month following discontinuation of therapy and that two reliable forms of contraception should be used simultaneously, one of which should be non-hormonal. Advise females of reproductive potential that bexarotene therapy should be initiated on the second or third day of a normal menstrual period. Instruct patient to immediately stop taking bexarotene if she becomes pregnant while taking this drug. Advise male patients with sexual partners who are pregnant, possibly pregnant, or who could become pregnant that they must use condoms during sexual intercourse while taking bexarotene and for at least one month after the last dose of the drug. Pancreatitis Advise patients of the risk of developing pancreatitis, which may be accompanied by nausea, vomiting, and abdominal or back pain and to immediately contact their healthcare provider if these symptoms occur [ see Warnings and Precautions (5.2) ]. Hepatotoxicity Inform patients of the possibility of developing liver function abnormalities and serious hepatic toxicity. Advise patients to immediately contact their healthcare provider if signs of liver failure occur, including jaundice, anorexia, bleeding, or bruising [ see Warnings and Precautions (5.3) ]. Neutropenia Advise patients of the possibility of developing neutropenia and to immediately contact their healthcare provider should they develop a fever, particularly in association with any suggestion of infection [ see Warnings and Precautions (5.5) ]. Cataracts Advise patients of the possibility of developing new or worsening cataracts and to inform their healthcare provider about any changes in their vision during treatment with bexarotene [ see Warnings and Precautions (5.6) ]. Vitamin A Supplementation Hazard Advise patients to limit vitamin A intake to ≤15,000 IU/day to avoid potential additive toxic effects. Hypoglycemia and Diabetes Mellitus Advise patients of the possibility of developing hypoglycemia when using insulin, agents enhancing insulin secretion, or insulin-sensitizers while on bexarotene therapy. Instruct patients on these medications to check their blood sugar frequently and to notify their physicians of any changes in blood sugar level [ see Warnings and Precautions (5.8) ]. Photosensitivity Advise patients of potential increased skin sensitivity to sunlight while taking bexarotene and to minimize exposure to sunlight and artificial ultraviolet light [ see Warnings and Precautions (5.9) ]. Laboratory Tests Advise patients of laboratory testing which will occur during therapy to monitor lipids, liver function, thyroid function, and white blood cell counts [ see Warnings and Precautions (5.10) ]. If applicable, advise patients of monthly pregnancy testing [ see Use In Specific Populations (8.3) ]. Administration Instructions Advise patients to take bexarotene with a meal [ see DOSAGE AND ADMINISTRATION ].

14 CLINICAL STUDIES Bexarotene was evaluated in two clinical trials in 152 patients with advanced and early stage cutaneous T-cell lymphoma (CTCL) in two multicenter, open-label, historically-controlled clinical trials conducted in the U.S., Canada, Europe, and Australia. The advanced disease patients had disease refractory to at least one prior systemic therapy (median of two, range one to six prior systemic therapies) and had been treated with a median of five (range 1 to 11) prior systemic, irradiation, and/or topical therapies. Early disease patients were intolerant to, had disease that was refractory to, or had reached a response plateau of six months on, at least two prior therapies. The patients entered had been treated with a median of 3.5 (range 2 to 12) therapies (systemic, irradiation, and/or topical). The two clinical trials enrolled a total of 152 patients, 102 of whom had disease refractory to at least one prior systemic therapy, 90 with advanced disease and 12 with early disease. This is the patient population for whom bexarotene is indicated. Patients were initially treated with a starting dose of 650 mg/m 2 /day with a subsequent reduction of starting dose to 500 mg/m 2 /day. Neither of these starting doses was tolerated, and the starting dose was then reduced to 300 mg/m 2 /day. If, however, a patient on 300 mg/m 2 /day of bexarotene showed no response after eight or more weeks of therapy, the dose could be increased to 400 mg/m 2 /day. Tumor response was assessed in both trials by observation of up to five baseline-defined index lesions using a Composite Assessment of Index Lesion Disease Severity (CA). This endpoint was based on a summation of the grades, for all index lesions, of erythema, scaling, plaque elevation, hypopigmentation or hyperpigmentation, and area of involvement. Also considered in response assessment was the presence or absence of cutaneous tumors and extracutaneous disease manifestations. All tumor responses required confirmation over at least two assessments separated by at least four weeks. A partial response was defined as an improvement of at least 50% in the index lesions without worsening, or development of new cutaneous tumors or non-cutaneous manifestations. A complete clinical response required complete disappearance of all manifestations of disease, but did not require confirmation by biopsy. At the initial dose of 300 mg/m 2 /day, 1/62 (1.6%) of patients had a complete clinical tumor response and 19/62 (30%) of patients had a partial tumor response. The rate of relapse (25% increase in CA or worsening of other aspects of disease) in the 20 patients who had a tumor response was 6/20 (30%) over a median duration of observation of 21 weeks, and the median duration of tumor response had not been reached. Responses were seen as early as 4 weeks and new responses continued to be seen at later visits.

8.5 Geriatric Use Of the total patients with CTCL in clinical trials of bexarotene, 64% were 60 years or older, while 33% were 70 years or older. No overall differences in safety were observed between patients 70 years or older and younger patients, but greater sensitivity of some older individuals to bexarotene cannot be ruled out. Responses to bexarotene were observed across all age group decades, without preference for any individual age group decade.

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

8.1 Pregnancy Risk Summary Bexarotene, a retinoid, can cause fetal harm based on findings from animal studies when administered to a pregnant female and is contraindicated during pregnancy. Bexarotene was teratogenic and caused developmental mortality in rats following oral administration during organogenesis [ see Data ]. Bexarotene must not be given to a pregnant female or a female who intends to become pregnant. If pregnancy does occur during treatment with bexarotene, immediately discontinue the drug and advise the pregnant female of the potential risk to a fetus. The background risk of major birth defects and miscarriage for the indicated populations are unknown. However, the background risk in the U.S. general population of major birth defects is 2 to 4% and of miscarriage is 15 to 20% of clinically recognized pregnancies. Data Animal Data Bexarotene caused malformations when administered orally to pregnant rats during days 7 to 17 of gestation. Developmental abnormalities included incomplete ossification at 4 mg/kg/day and cleft palate, depressed eye bulge/microphthalmia, and small ears at 16 mg/kg/day. The plasma AUC of bexarotene in rats at 4 mg/kg/day is approximately one third the AUC in humans at the recommended daily dose. At doses greater than 10 mg/kg/day, bexarotene caused developmental mortality. The no effect dose for fetal effects in rats was 1 mg/kg/day (producing an AUC approximately one sixth of the AUC at the recommended human daily dose).

8 USE IN SPECIFIC POPULATIONS 8.1 Pregnancy Risk Summary Bexarotene, a retinoid, can cause fetal harm based on findings from animal studies when administered to a pregnant female and is contraindicated during pregnancy. Bexarotene was teratogenic and caused developmental mortality in rats following oral administration during organogenesis [ see Data ]. Bexarotene must not be given to a pregnant female or a female who intends to become pregnant. If pregnancy does occur during treatment with bexarotene, immediately discontinue the drug and advise the pregnant female of the potential risk to a fetus. The background risk of major birth defects and miscarriage for the indicated populations are unknown. However, the background risk in the U.S. general population of major birth defects is 2 to 4% and of miscarriage is 15 to 20% of clinically recognized pregnancies. Data Animal Data Bexarotene caused malformations when administered orally to pregnant rats during days 7 to 17 of gestation. Developmental abnormalities included incomplete ossification at 4 mg/kg/day and cleft palate, depressed eye bulge/microphthalmia, and small ears at 16 mg/kg/day. The plasma AUC of bexarotene in rats at 4 mg/kg/day is approximately one third the AUC in humans at the recommended daily dose. At doses greater than 10 mg/kg/day, bexarotene caused developmental mortality. The no effect dose for fetal effects in rats was 1 mg/kg/day (producing an AUC approximately one sixth of the AUC at the recommended human daily dose). 8.2 Lactation Risk Summary There is no information regarding the presence of bexarotene in human milk, the effects on the breast fed infant, or the effects on milk production. Because many drugs are excreted in human milk and because of the potential for serious adverse reactions in nursing infants from bexarotene, discontinue breastfeeding during treatment with bexarotene. 8.3 Females and Males of Reproductive Potential Pregnancy Testing Obtain a negative serum pregnancy test (e.g., serum beta-human chorionic gonadotropin [beta-HCG]) with a sensitivity of at least 50 mlU/L within one week prior to bexarotene therapy. Obtain another pregnancy test at monthly intervals while the patient remains on bexarotene. Contraception Females Bexarotene can cause fetal harm when administered to a pregnant female [ see Use in Specific Populations (8.1) ]. Females of reproductive potential should be advised to avoid becoming pregnant when bexarotene is used. Effective contraception must be used for one month prior to the initiation of therapy, during therapy and for at least one month following discontinuation of therapy; it is recommended that two reliable forms of contraception be used simultaneously unless abstinence is the chosen method. Bexarotene can potentially induce metabolic enzymes and thereby theoretically reduce the plasma concentrations of oral or other systemic hormonal contraceptives [ see Drug Interactions (7) ]. Thus, if treatment with bexarotene is intended in a female with reproductive potential, it is strongly recommended that one of the two reliable forms of contraception should be non-hormonal. Bexarotene therapy should be initiated on the second or third day of a normal menstrual period. No more than a one month supply of bexarotene should be given to the patient so that the results of pregnancy testing can be assessed and counseling regarding avoidance of pregnancy and birth defects can be reinforced. Males Male patients with sexual partners who are pregnant, possibly pregnant, or who could become pregnant must use condoms during sexual intercourse while taking bexarotene and for at least one month after the last dose of drug. 8.4 Pediatric Use Safety and effectiveness of bexarotene in pediatric patients have not been established. 8.5 Geriatric Use Of the total patients with CTCL in clinical trials of bexarotene, 64% were 60 years or older, while 33% were 70 years or older. No overall differences in safety were observed between patients 70 years or older and younger patients, but greater sensitivity of some older individuals to bexarotene cannot be ruled out. Responses to bexarotene were observed across all age group decades, without preference for any individual age group decade. 8.6 Hepatic Impairment No specific studies have been conducted with bexarotene in subjects with hepatic impairment. Hepatic impairment is expected to lead to decreased clearance [ see Clinical Pharmacology (12.3) ]. If bexarotene is used in patients with hepatic impairment, monitor for signs of toxicity that may be due to increased exposure.

16 HOW SUPPLIED/STORAGE AND HANDLING Bexarotene Capsules are supplied as 75 mg off-white, oblong soft gelatin capsules, imprinted "US285" in black ink. They are supplied as follows: Bottles of 100 capsules: NDC 0832-0285-00 Store at 2° to 25°C (36° to 77°F). Avoid exposing to high temperatures and humidity after the bottle is opened. Protect from light.

Store at 2° to 25°C (36° to 77°F). Avoid exposing to high temperatures and humidity after the bottle is opened. Protect from light.

WARNING: BIRTH DEFECTS Bexarotene is a member of the retinoid class of drugs that is associated with birth defects in humans. Bexarotene also caused birth defects when administered orally to pregnant rats. Bexarotene must not be administered to a pregnant woman. ( 8.1 ) WARNING: BIRTH DEFECTS See full prescribing information for complete boxed warning. Bexarotene is a member of the retinoid class of drugs that is associated with birth defects in humans. Bexarotene also caused birth defects when administered orally to pregnant rats. Bexarotene must not be administered to a pregnant woman. ( 8.1 )