Saxenda Dosing Calculation for 90-Day Supply
For a 90-day course at the maintenance dose of 3 mg daily, you will need 15 pens (45 mL total).
Dosing Clarification
There appears to be confusion in your question. Saxenda is dosed in milligrams (mg), not milliliters (mL) 1. Each Saxenda pen contains 18 mg of liraglutide in 3 mL of solution, providing a concentration of 6 mg/mL 1.
Standard Maintenance Dosing
- The FDA-approved maintenance dose is 3 mg once daily subcutaneously 1
- Lower doses (0.6 mg, 1.2 mg, 1.8 mg, 2.4 mg) are for titration only during the first 4-5 weeks 2, 1
- Each 3 mL pen delivers 6 doses of 3 mg (or 18 mg total) 1
90-Day Supply Calculation
At the maintenance dose of 3 mg daily:
- 90 days × 3 mg/day = 270 mg total needed
- Each pen contains 18 mg
- 270 mg ÷ 18 mg per pen = 15 pens required
- Total volume: 15 pens × 3 mL = 45 mL
Dose Escalation Schedule
Saxenda must be titrated over 5 weeks to reduce gastrointestinal side effects 2, 1:
- Week 1: 0.6 mg daily
- Week 2: 1.2 mg daily
- Week 3: 1.8 mg daily
- Week 4: 2.4 mg daily
- Week 5 onward: 3 mg daily (maintenance dose)
Important Clinical Considerations
Discontinuation criteria must be evaluated 2, 3, 4:
- Adults should discontinue if <4% body weight loss after 16 weeks at 3 mg daily 2, 1
- The medication should be stopped if patients cannot tolerate the 3 mg dose 1
Real-world data shows many patients do not reach 3 mg daily 5, 6:
- In Swiss practice, median maximum dose was only 1.5 mg, with just 13.7% reaching 3 mg 6
- Weight loss remained clinically significant even at lower doses (1.8-2.4 mg daily) 5
- Gastrointestinal side effects are the primary reason for dose limitation 5, 6
Storage and Handling
Each pen must be discarded 30 days after first use 1, which is a critical consideration for calculating actual supply needs in clinical practice.