VIP Regimen Doses with Mesna
For the VIP (etoposide-ifosfamide-cisplatin) regimen, administer mesna at a total daily dose equal to 60% of the ifosfamide dose using the standard three-dose IV schedule, or 100% of the ifosfamide dose using the IV/oral hybrid schedule.
Standard VIP Chemotherapy Dosing
The VIP regimen typically consists of:
- Etoposide: 75-100 mg/m² IV daily × 5 days
- Ifosfamide: 1.2-2.5 g/m² IV daily × 5 days (most commonly 1.2 g/m²)
- Cisplatin: 20 mg/m² IV daily × 5 days
Cycles repeat every 21 days 1, 2, 3, 4.
Mesna Uroprotection Schedules
Option 1: All-Intravenous Schedule (Standard)
Mesna dosing equals 60% of total daily ifosfamide dose, divided into three equal bolus injections 5, 6:
- 20% of ifosfamide dose IV bolus: 15 minutes before ifosfamide
- 20% of ifosfamide dose IV bolus: 4 hours after ifosfamide
- 20% of ifosfamide dose IV bolus: 8 hours after ifosfamide
Example: If ifosfamide dose is 1.2 g/m², give mesna 240 mg/m² at each of the three time points (total daily mesna = 720 mg/m²) 6.
This schedule is recommended by ASCO guidelines and FDA labeling for standard-dose ifosfamide (<2.5 g/m²/day) 5, 6.
Option 2: IV/Oral Hybrid Schedule (Convenient Alternative)
Mesna dosing equals 100% of total daily ifosfamide dose 5, 6:
- 20% of ifosfamide dose IV bolus: at time of ifosfamide administration
- 40% of ifosfamide dose PO: 2 hours after ifosfamide
- 40% of ifosfamide dose PO: 6 hours after ifosfamide
Example: If ifosfamide dose is 1.2 g/m², give mesna 240 mg/m² IV, then 480 mg/m² PO at 2 hours, then 480 mg/m² PO at 6 hours (total daily mesna = 1,200 mg/m²) 6.
Important caveat: This IV/oral regimen has only been validated for ifosfamide doses ≤2.0 g/m²/day. For higher doses, use the all-IV schedule 5, 6.
If the patient vomits within 2 hours of oral mesna, repeat the oral dose or switch to IV mesna 5, 6.
Option 3: Continuous Infusion (For Continuous Ifosfamide Infusions)
If ifosfamide is given as continuous infusion 5:
- 20% of total ifosfamide dose as IV bolus before starting ifosfamide
- 40% of total ifosfamide dose as continuous IV infusion during and for 12-24 hours after completing ifosfamide
Clinical Context for VIP Regimen
VIP is primarily used as salvage therapy for:
- Germ cell tumors (testicular/ovarian): 4 cycles for intermediate/poor-risk disease 1, 2
- Refractory solid tumors: Various schedules, typically 4-6 cycles 3, 4, 7
The most common VIP schedule uses ifosfamide 1.2 g/m² daily × 5 days, making the standard mesna dose 240 mg/m² three times daily with the all-IV schedule 3, 4, 8.
Critical Safety Points
- Maintain adequate hydration and monitor urine for hematuria throughout treatment 6
- Myelosuppression is dose-limiting: Grade 3-4 neutropenia occurs in 36-70% of patients; febrile neutropenia in 15-25% 3, 4, 7
- Repeat mesna dosing schedule each day that ifosfamide is administered 5, 6
- Do not reduce mesna dose if ifosfamide is dose-reduced; maintain the same ratio 6
- If severe hematuria develops despite appropriate mesna, consider ifosfamide dose reduction or discontinuation 6
The all-IV schedule provides maximum flexibility and is preferred when ifosfamide doses exceed 2.0 g/m²/day or when patient compliance with oral medications is uncertain 5.