Romidepsin

FDA Drug Information • Also known as: Istodax, Romidepsin

Brand Names: Istodax, Romidepsin
Dosage Form: POWDER
Product Type: BULK INGREDIENT

Description

11 DESCRIPTION Romidepsin, a histone deacetylase (HDAC) inhibitor, is a bicyclic depsipeptide. At room temperature, romidepsin is a white powder and is described chemically as (1 S ,4 S ,7 Z ,10 S ,16 E ,21 R )-7-ethylidene-4,21-bis(1-methylethyl)-2-oxa-12,13-dithia-5,8,20,23-tetraazabicyclo[8.7.6]tricos-16-ene-3,6,9,19,22-pentone. The structural formula is: C 24 H 36 N 4 O 6 S 2 M.W. 540.71 Romidepsin for injection is intended for intravenous infusion only after reconstitution with the supplied diluent and after further dilution with 0.9% Sodium Chloride, USP. Romidepsin is supplied as a kit containing 2 vials. Romidepsin for injection is a sterile lyophilized white powder and is supplied in a 10 mg single-dose vial containing 11 mg romidepsin, 22 mg povidone, USP, and hydrochloric acid, NF, as a pH adjuster. Diluent for romidepsin is a sterile clear solution and is supplied in a single-dose vial with 2.2 mL deliverable volume. Diluent for romidepsin contains 80% (v/v) propylene glycol, USP and 20% (v/v) dehydrated alcohol, USP. Structural Formula

What Is Romidepsin Used For?

1 INDICATIONS AND USAGE Romidepsin for injection is indicated for the treatment of cutaneous T-cell lymphoma (CTCL) in adult patients who have received at least one prior systemic therapy. Romidepsin for injection is a histone deacetylase (HDAC) inhibitor indicated for the treatment of cutaneous T-cell lymphoma (CTCL) in adult patients who have received at least one prior systemic therapy ( 1 ).

Dosage and Administration

2 DOSAGE AND ADMINISTRATION 14 mg/m 2 administered intravenously over a 4-hour period on days 1, 8, and 15 of a 28-day cycle. Repeat cycles every 28 days provided that the patient continues to benefit from and tolerates the drug ( 2.1 ). Discontinue or interrupt treatment (with or without dose reduction to 10 mg/m 2 ) to manage drug toxicity ( 2.2 ). Reduce starting dose in patients with moderate and severe hepatic impairment ( 2.3 ). 2.1 Dosage Information The recommended dosage of romidepsin is 14 mg/m 2 administered intravenously over a 4-hour period on days 1, 8, and 15 of a 28-day cycle. Cycles should be repeated every 28 days provided that the patient continues to benefit from and tolerates the drug. 2.2 Dosage Modification Nonhematologic toxicities except alopecia Grade 2 or 3 toxicity: Treatment with romidepsin should be delayed until toxicity returns to Grade 0-1 or baseline, then therapy may be restarted at 14 mg/m 2 . If Grade 3 toxicity recurs, treatment with romidepsin should be delayed until toxicity returns to Grade 0-1 or baseline and the dose should be permanently reduced to 10 mg/m 2 . Grade 4 toxicity: Treatment with romidepsin should be delayed until toxicity returns to Grade 0-1 or baseline, then the dose should be permanently reduced to 10 mg/m 2 . Romidepsin should be discontinued if Grade 3 or 4 toxicities recur after dose reduction. Hematologic toxicities Grade 3 or 4 neutropenia or thrombocytopenia: Treatment with romidepsin should be delayed until the specific cytopenia returns to ANC greater than or equal to 1.5×10 9 /L and platelet count greater than or equal to 75×10 9 /L or baseline, then therapy may be restarted at 14 mg/m 2 . Grade 4 febrile (greater than or equal to 38.5ºC) neutropenia or thrombocytopenia that requires platelet transfusion: Treatment with romidepsin should be delayed until the specific cytopenia returns to less than or equal to Grade 1 or baseline, and then the dose should be permanently reduced to 10 mg/m 2 . 2.3 Dosage in Patients with Hepatic Impairment For patients with moderate or severe hepatic impairment, reduce the starting dose of Romidepsin for injection as shown in Table 1 and monitor for toxicities more frequently. Dosage adjustment is not required for patients with mild hepatic impairment. Table 1: Recommendations for Starting Dose in Patients with Moderate and Severe Hepatic Impairment ULN=Upper limit of normal. Hepatic Impairment Bilirubin Levels Romidepsin for injection Dose Moderate greater than 1.5 x ULN to less than or equal to 3 x ULN 7 mg/m 2 Severe greater than 3 x ULN 5 mg/m 2 2.4 Instructions for Preparation and Intravenous Administration Romidepsin for injection is a hazardous drug. Use appropriate handling procedures. 1 Romidepsin for injection must be reconstituted with the supplied diluent and further diluted with 0.9% Sodium Chloride Injection, USP, before intravenous infusion. Romidepsin for injection and diluent vials contain an overfill to ensure the recommended...

Side Effects (Adverse Reactions)

6 ADVERSE REACTIONS The following adverse reactions are described in more detail in other sections of the prescribing information. Myelosuppression [see Warnings and Precautions ( 5.1 )] Infections [see Warnings and Precautions ( 5.2 )] Electrocardiographic Changes [see Warnings and Precautions ( 5.3 )] Tumor Lysis Syndrome [see Warnings and Precautions ( 5.4 )] The most common adverse reactions (≥30%), excluding laboratory abnormalities, are nausea, fatigue, infections, vomiting, anorexia, electrocardiogram ST-T wave changes, dysgeusia, constipation and pruritus. Grade 3-4 laboratory abnormalities (≥10%) include lymphopenia, neutropenia, anemia and thrombocytopenia ( 6 ). To report SUSPECTED ADVERSE REACTIONS, contact Fresenius Kabi USA, LLC at 1-800-551-7176 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 data in the WARNINGS AND PRECAUTIONS reflect exposure to romidepsin in four clinical trials involving 363 patients with T-cell lymphoma, including 185 patients with CTCL. Romidepsin was administered as a single agent at a dosage of 14 mg/m 2 on days 1, 8, and 15 of a 28-day cycle. Among 363 patients who received romidepsin, 21% were exposed for 6 months or longer and 13% were exposed for greater than one year. Cutaneous T-Cell Lymphoma The safety of romidepsin was evaluated in 185 patients with CTCL in 2 single arm clinical studies in which patients received a dosage of 14 mg/m 2 on days 1, 8, and 15 of a 28-day cycle. Treatment continued as long as the patient benefitted from and tolerated the drug. The mean duration of treatment in these studies was 5.6 months (range: <1 to 83.4 months). Common Adverse Reactions Table 2 summarizes the most frequent adverse reactions (>20%) regardless of causality using the National Cancer Institute-Common Terminology Criteria for Adverse Events (NCI-CTCAE, Version 3.0). Due to methodological differences between the studies, the AE data are presented separately for Study 1 and Study 2. Adverse reactions are ranked by their incidence in Study 1. Laboratory abnormalities commonly reported (>20%) as adverse reactions are included in Table 2 . Table 2. Adverse Reactions Occurring in >20% of Patients in Either CTCL Study (N=185) Adverse Reactions n (%) Study 1 (n=102) Study 2 (n=83) All grades Grade 3 or 4 All grades Grade 3 or 4 Any adverse reactions 99 (97) 36 (35) 83 (100) 68 (82) Nausea 57 (56) 3 (3) 71 (86) 5 (6) Asthenia/Fatigue 54 (53) 8 (8) 64 (77) 12 (14) Infections 47 (46) 11 (11) 45 (54) 27 (33) Vomiting 35 (34) 1 (<1) 43 (52) 8 (10) Anorexia 23 (23) 1 (<1) 45 (54) 3 (4) Hypomagnesemia 22 (22) 1 (<1) 23 (28) 0 Diarrhea 20 (20) 1 (<1) 22 (27) 1 (1) Pyrexia 20 (20) 4 (4) 19 (23) 1 (1) Anemia 19 (19) 3 (3) 60 (72) 13 (16) Thrombocytopenia 17 (17) 0 54 (65) 12 (14) Dysgeusia 15 (15) 0 33 (40) 0 Constipation 12 (12) 2 (2) 32 (39) 1 (1) Neutropenia 11 (11) 4 (4) 47 (57) 22 (27) Hypotension 7 (7) 3 (3) 19 (23) 3 (4) Pruritus 7 (7) 0 26 (31) 5 (6) Hypokalemia 6 (6) 0 17 (20) 2 (2) Dermatitis/Exfoliative dermatitis 4 (4) 1 (<1) 22 (27) 7 (8) Hypocalcemia 4 (4) 0 43 (52) 5 (6) Leukopenia 4 (4) 0 38 (46) 18 (22) Lymphopenia 4 (4) 0 47 (57) 31 (37) Alanine aminotransferase increased 3 (3) 0 18 (22) 2 (2) Aspartate aminotransferase increased 3 (3) 0 23 (28) 3 (4) Hypoalbuminemia 3 (3) 1 (<1) 40 (48) 3 (4) Electrocardiogram ST-T wave changes 2 (2) 0 52 (63) 0 Hyperglycemia 2 (2) 2 (2) 42 (51) 1 (1) Hyponatremia 1 (<1) 1 (<1) 17 (20) 2 (2) Hypermagnesemia 0 0 22 (27) 7 (8) Hypophosphatemia 0 0 22 (27) 8 (10) Hyperuricemia 0 0 27 (33) 7 (8) Serious Adverse Reactions Infections were the most common type of SAE reported in both studies with 8 patients (8%) in Study 1 and 26 patients (31%) in Study 2...

Drug Interactions

7 DRUG INTERACTIONS Carefully monitor prothrombin time (PT) and International Normalized Ratio (INR) in patients concurrently administered romidepsin and warfarin or coumarin derivatives ( 7.1 ). Monitor for toxicities related to increased romidepsin exposure when co- administering romidepsin with strong CYP3A4 inhibitors ( 7.2 ). Avoid use with rifampin and strong CYP3A4 inducers ( 7.3 ). 7.1 Warfarin or Coumarin Derivatives Prolongation of PT and elevation of INR were observed in a patient receiving romidepsin concomitantly with warfarin. Monitor PT and INR more frequently in patients concurrently receiving romidepsin and warfarin [see Clinical Pharmacology ( 12.3 )]. 7.2 Drugs That Inhibit CYP3A4 Enzymes Strong CYP3A4 inhibitors increase concentrations of romidepsin [see Clinical Pharmacology ( 12.3 )]. Monitor for toxicity related to increased romidepsin exposure and follow the dose modifications for toxicity [see Dosage and Administration ( 2.2 )] when romidepsin is initially co-administered with strong CYP3A4 inhibitors. 7.3 Drugs That Induce CYP3A4 Enzymes Rifampin (a potent CYP3A4 inducer) increased the concentrations of romidepsin [see Clinical Pharmacology ( 12.3 )] . Avoid co-administration of romidepsin with rifampin. The use of other potent CYP3A4 inducers should be avoided when possible.

Contraindications

4 CONTRAINDICATIONS None. None ( 4 ).

Pregnancy and Breastfeeding

8.1 Pregnancy Risk Summary Based on its mechanism of action and findings from animal studies, romidepsin can cause embryo-fetal harm when administered to a pregnant woman [see Clinical Pharmacology ( 12.1 )] . There are no available data on romidepsin use in pregnant women to inform a drug associated risk of major birth defects and miscarriage. In an animal reproductive study, romidepsin was embryocidal and caused adverse developmental outcomes including embryo-fetal toxicity and malformations at exposures below those in patients at the recommended dose (see Data ). Advise pregnant women of the potential risk to a fetus and to avoid becoming pregnant while receiving romidepsin and for at least 1 month after the last dose. The background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a 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 2-4% and 15-20%, respectively. Data Animal Data Romidepsin was administered intravenously to pregnant rats during the period of organogenesis at doses of 0.1, 0.2, or 0.5 mg/kg/day. Substantial resorption or postimplantation loss was observed at the high dose of 0.5 mg/kg/day, a maternally toxic dose. Adverse embryo-fetal effects were noted at romidepsin doses of ≥0.1 mg/kg/day, with systemic exposures (AUC) ≥0.2% of the human exposure at the recommended dose of 14 mg/m 2 /week. Drug-related fetal effects consisted of reduced fetal body weights, folded retina, rotated limbs, and incomplete sternal ossification.

Overdosage

10 OVERDOSAGE No specific information is available on the treatment of overdosage of romidepsin. Toxicities in a single-dose study in rats or dogs, at intravenous romidepsin doses up to 2.2-fold the recommended human dose based on the body surface area, included irregular respiration, irregular heartbeat, staggering gait, tremor, and tonic convulsions. In the event of an overdose, it is reasonable to employ the usual supportive measures, e.g., clinical monitoring and supportive therapy, if required. There is no known antidote for romidepsin and it is not known if romidepsin is dialyzable.

How Supplied

16 HOW SUPPLIED/STORAGE AND HANDLING How Supplied Romidepsin for injection is supplied as a kit including a sterile, lyophilized powder in a 10 mg single-dose vial containing 11 mg of romidepsin, 22 mg of the bulking agent, povidone, USP, and hydrochloric acid, NF, as a pH adjuster. In addition, each kit includes a single-dose sterile vial with 2.2 mL deliverable volume of the diluent composed of 80% propylene glycol, USP, and 20% dehydrated alcohol, USP. Product No. NDC No. 704928 63323-926-88 Romidepsin Kit containing 1 vial of romidepsin and 1 vial of diluent for romidepsin per carton. Storage and Handling Romidepsin for injection is supplied as a kit containing 2 vials in a single carton. The carton must be stored at 20° to 25°C (68° to 77°F) [see USP Controlled Room Temperature]. Romidepsin is a hazardous drug. Follow applicable special handling and disposal procedures. 1 The container closure is not made with natural rubber latex.

About This Information

This drug information is sourced from FDA-approved labeling via the openFDA database. It is intended for educational and reference purposes only. This is not medical advice. Always consult your healthcare provider before making decisions about medication. Drug information may be updated by the FDA; check with your pharmacist for the most current information.

What are side effects?

Side effects are unwanted reactions that can occur when taking a medication. They range from mild (headache, nausea) to severe (allergic reactions, organ damage). Not everyone experiences side effects, and severity varies. Report any concerning side effects to your doctor.

What are drug interactions?

Drug interactions occur when a medication is affected by another drug, food, or supplement. Interactions can make medications less effective or cause dangerous side effects. Always tell your doctor about all medications and supplements you take.