ETOPOPHOS

ETOPOPHOS (etoposide phosphate) is a topoisomerase inhibitor. The chemical name for etoposide phosphate is: 4'-Demethylepipodophyllotoxin 9-[4,6-O-(R)-ethylidene-β-D-glucopyranoside], 4' (dihydrogen phosphate). Etoposide phosphate has the following structure: Etoposide phosphate is a phosphate ester of etoposide, a semi-synthetic derivative of podophyllotoxin. ETOPOPHOS is available for intravenous infusion as a sterile lyophilized powder in single-dose vials for reconstitution containing 114 mg etoposide phosphate, equivalent to 100 mg etoposide, 32.7 mg sodium citrate USP, and 300 mg dextran 40. Image Etoposide Phosphate Chemical Structure

ETOPOPHOS is a topoisomerase inhibitor indicated for the treatment of patients with: Refractory testicular tumors, in combination with other chemotherapeutic drugs. ( 1 ) Small cell lung cancer, in combination with cisplatin, as first-line treatment. ( 1 ) 1.1 Refractory Testicular Tumors ETOPOPHOS is indicated, in combination with other chemotherapeutic drugs, for treatment of patients with refractory testicular tumors. 1.2 Small Cell Lung Cancer ETOPOPHOS is indicated, in combination with cisplatin, for first-line treatment of patients with small cell lung cancer.

Refractory testicular tumors: 50 to 100 mg/m 2 per day administered intravenously over 5 minutes to 3.5 hours on days 1 through 5, or 100 mg/m 2 administered intravenously over 5 minutes to 3.5 hours on days 1, 3, and 5. ( 2.1 ) Small cell lung cancer: 35 mg/m 2 per day administered intravenously over 5 minutes to 3.5 hours for 4 days or 50 mg/m 2 per day administered intravenously over 5 minutes to 3.5 hours for 5 days. ( 2.2 ) Do not give by bolus injection. ( 2.4 ) Renal impairment: Reduce the recommended dose to 75% in patients with creatinine clearance 15 to 50 mL/min. ( 2.3 ) 2.1 Refractory Testicular Tumors The recommended dose of ETOPOPHOS is: 50 to 100 mg/m 2 per day administered intravenously over 5 minutes to 3.5 hours on days 1 through 5 of each 21-day (or 28-day cycle), or 100 mg/m 2 administered intravenously over 5 minutes to 3.5 hours on days 1, 3, and 5 of each 21-day (or 28-day cycle). 2.2 Small Cell Lung Cancer The recommended dose of ETOPOPHOS is: • 35 mg/m 2 per day administered intravenously over 5 minutes to 3.5 hours for 4 days, or • 50 mg/m 2 per day administered intravenously over 5 minutes to 3.5 hours for 5 days. 2.3 Dosage Modification In patients with a creatinine clearance (CLcr) 15-50 mL/min, administer 75% of the recommended dose. Data are not available in patients with CLcr less than 15 mL/min. Consider further dose reduction in these patients. 2.4 Preparation and Administration Preparation Reconstitute with Sterile Water for Injection, USP; 5% Dextrose Injection, USP; 0.9% Sodium Chloride Injection, USP; Bacteriostatic Water for Injection with Benzyl Alcohol; or Bacteriostatic Sodium Chloride for Injection with Benzyl Alcohol, using the quantity of diluent shown below: Vial Strength Volume of Diluent Final Concentration 100 mg 5 mL 20 mg/mL 10 mL 10 mg/mL Following reconstitution, ETOPOPHOS can be further diluted to concentrations as low as 0.1 mg/mL with either 5% Dextrose Injection, USP, or 0.9% Sodium Chloride Injection, USP. Inspect parenteral drug products visually for particulate matter and discoloration prior to administration whenever solution and container permit. Storage After reconstitution, store under the following conditions: Refrigerated 2° to 8°C (36° to 46°F) for 7 days; Room temperature at 20° to 25°C (68° to 77°F) for 24 hours following reconstitution with Sterile Water for Injection, USP, 5% Dextrose Injection, USP, or 0.9% Sodium Chloride Injection, USP; Room temperature 20° to 25°C (68° to 77°F) for 48 hours following reconstitution with Bacteriostatic Water for Injection with benzyl alcohol or Bacteriostatic Sodium Chloride for Injection with benzyl alcohol. Reconstituted ETOPOPHOS solutions further diluted as directed can be stored under refrigeration 2° to 8°C (36° to 46°F) or at room temperature 20° to 25°C (68° to 77°F) for 24 hours. Administration DO NOT GIVE ETOPOPHOS BY BOLUS INTRAVENOUS INJECTION. ETOPOPHOS solutions may be administered at infusion rates up to 3.5 hours. Extravasation of ETOPOPHOS may result in swelling, pain, cellulitis, and necrosis including skin necrosis. ETOPOPHOS is a cytotoxic drug. Follow applicable special handling and disposal procedures. 1 To minimize the risk of dermal exposure, use of gloves is recommended. If dermal contact occurs, immediately and thoroughly wash areas of skin contact with soap and water and flush mucosa with water.

ETOPOPHOS is contraindicated in patients with a history of a severe hypersensitivity reaction to etoposide products [see Warnings and Precautions (5.3) ] . Hypersensitivity to etoposide products. ( 4 , 5.3 )

The following serious adverse reactions are described elsewhere in the labeling: Myelosuppression [see Warnings and Precautions (5.1) ] Secondary leukemias [see Warnings and Precautions (5.2) ] Hypersensitivity reactions [see Warnings and Precautions (5.3) ] Most common adverse reaction is neutropenia. ( 6 ) To report SUSPECTED ADVERSE REACTIONS, contact the Safety Call Center at 1-866-885-0690 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. ETOPOPHOS has been used as a single agent in clinical studies involving 206 patients with a variety of malignancies (including one non-Hodgkin’s lymphoma) and in combination with cisplatin in 60 patients with small cell lung cancer. The most common adverse reaction was neutropenia. Other Important Adverse Reactions Gastrointestinal Toxicity Nausea and vomiting are the major gastrointestinal toxicities. The severity of nausea and vomiting is generally mild to moderate, with treatment discontinuation required in 1% of patients. Nausea and vomiting are managed with standard antiemetic therapy. Other Toxicities Other clinically important adverse reactions in clinical trials were: Gastrointestinal: abdominal pain, constipation, dysphagia General: fever Ocular: transient cortical blindness, optic neuritis Respiratory: interstitial pneumonitis/pulmonary fibrosis Skin: pigmentation, radiation recall dermatitis, Stevens-Johnson syndrome, and toxic epidermal necrolysis Neurologic: seizure, aftertaste Hepatobiliary disorder: hepatotoxicity 6.2 Postmarketing Experience The following adverse reactions have been identified during postapproval use of ETOPOPHOS. 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. Extravasation Extravasation, resulting in local soft tissue toxicity. Extravasation of ETOPOPHOS can result in swelling, pain, cellulitis, and necrosis, including skin necrosis. Acute Renal Failure Reversible cases of acute renal failure have been reported with administration of high dose (2220 mg/m 2 ) ETOPOPHOS with total body irradiation used for hematopoietic stem cell transplantation. The ETOPOPHOS formulation contains dextran 40, which has been associated with acute renal failure when administered in high doses.

Warfarin: Co-administration of ETOPOPHOS with warfarin can result in elevated international normalized ratio (INR). Measure INR frequently. Warfarin: Co-administration can result in elevated international normalized ratio (INR). Measure INR frequently. ( 7 )