Drug Detail:Enfortumab vedotin (Enfortumab vedotin [ en-fort-ue-mab-ve-doe-tin ])
Drug Class: Miscellaneous antineoplastics
Usual Adult Dose for Urothelial Carcinoma
1.25 mg/kg (up to a maximum of 125 mg for patients 100 kg or greater) IV over 30 minutes on Days 1, 8. and 15 of a 28-day cycle until disease progression or unacceptable toxicity
Use: For locally advanced or metastatic urothelial cancer (mUC) who have previously received a programmed death receptor-1 (PD-1) or programmed death-ligand 1 (PD-L1) inhibitor, and a platinum-containing chemotherapy in the neoadjuvant/adjuvant, locally advanced or metastatic setting
Renal Dose Adjustments
Mild (CrCL greater than 60 to 90 mL/min), moderate (CrCL 30 to 60 mL/min),
or severe (CrCL less than 30 mL/min) renal impairment: No adjustment recommended.
Liver Dose Adjustments
Mild (Child-Pugh A) hepatic impairment: No adjustment recommended.
Moderate (Child-Pugh B) or severe (Child-Pugh C) hepatic impairment: Not recommended.
Dose Adjustments
RECOMMENDED DOSE REDUCTION SCHEDULE:
- Starting dose: 1.25 mg/kg up to 125 mg
- First dose reduction: 1 mg/kg up to 100 mg
- Second dose reduction: 0.75 mg/kg up to 75 mg
- Third dose reduction: 0.5 mg/kg up to 50 mg
DOSE MODIFICATIONS:
HYPERGLYCEMIA:
- Blood glucose greater than 250 mg/dL: Withhold this drug until elevated blood glucose has improved to 250 mg/dL or less then resume therapy at the same dose level.
- Grade 2: Withhold until Grade 1 or less, then resume therapy at the same dose level (if first occurrence); for a recurrence, withhold until Grade 1 or less then, resume therapy reduced by one dose level.
- Grade 3 or greater: Permanently discontinue this drug.
- Grade 3 (severe): Withhold this drug until Grade 1 or less, then resume therapy at the same dose level or consider dose reduction by one dose level.
- Grade 4 or recurrent Grade 3: Permanently discontinue this drug.
- Grade 3: Withhold this drug until Grade 1 or less, then resume therapy at the same dose level or consider dose reduction by one dose level.
- Grade 4: Permanently discontinue this drug.
- Grade 3 or 3 thrombocytopenia: Withhold this drug until Grade 1 or less, then resume therapy at the same dose level or consider dose reduction by one dose level.
- Grade 4 thrombocytopenia: Withhold until Grade 1 or less, then reduce dose by one dose level or discontinue therapy.
Precautions
CONTRAINDICATIONS:
- None
Safety and efficacy have not been established in patients younger than 18 years.
Consult WARNINGS section for additional precautions.
Dialysis
Data not available
Other Comments
Administration advice:
- After reconstitution, immediately administer the infusion IV over 30 minutes.
- If the infusion is not administered immediately, the prepared infusion bag should not be stored longer than 8 hours at 2C to 8C (36 F to 46 F). NOTE: Do not freeze.
- Do not administer this drug as an IV push or bolus.
- Do not mix this drug with, or administer as an infusion with, other medicinal products.
Storage requirements:
- Store unopened vials refrigerated at 2C to 8C (36F to 46F) in the original carton. --Do not freeze.
- Do not shake.
Reconstitution/preparation techniques:
- Prior to administration, the vial is reconstituted with Sterile Water for Injection (SWFI).
- The reconstituted solution is subsequently diluted in an IV infusion bag containing either 5% Dextrose Injection, 0.9% Sodium Chloride Injection, or Lactated Ringer's Injection.
- The manufacturer product information should be consulted.
IV compatibility:
- Sterile water
- Dextrose 5% injection
- Sodium chloride 0.9% injection
General:
- This drug is cytotoxic. Follow applicable special handling and disposal procedures.
Patient advice:
- Contact your healthcare provider immediately if you experience numbness and tingling of the hands or feet or muscle weakness.
- Contact your healthcare provider immediately if you experience any visual changes.
- To prevent or treat dry eyes, use artificial tear substitutes.
- This drug may cause rashes and severe skin reactions.
- This drug can harm a developing fetus.