Semaglutide Reconstitution Guide: Step-by-Step Protocol
1) Required Materials
2) Step-by-Step Process
Preparation
- Clean workspace thoroughly
- Wash hands with soap and water
- Put on sterile gloves
- Gather all materials
- Check vial integrity
Vial Preparation
- Remove plastic cap
- Clean stopper with alcohol
- Allow alcohol to dry (30 sec)
- Maintain sterility
Reconstitution
- Calculate water amount using our calculator
- Draw correct volume
- Insert at 90° angle
- Inject down vial wall
- Swirl gently to mix
Important Safety Notes
- Use only bacteriostatic water for injection
- Maintain sterile technique throughout
- Check solution clarity before use
- Discard if cloudy or contains particles
3) Storage Requirements
Temperature
Store between 2-8°C (36-46°F)
Duration
Use within 30 days
Light
Protect from direct light
Protection
Use TPU caps and storage case
Note: This guide is for research purposes only. Always follow product documentation and consult qualified professionals for medical guidance.
Semaglutide Reconstitution by Vial Size
Compound semaglutide ships in 2 mg, 3 mg, 5 mg, 10 mg, and (less commonly) 15 mg lyophilized vials. Reconstitution method is identical; BAC water amount and resulting concentration change.
How to Reconstitute Semaglutide 2mg
Standard: 2 mg vial + 2 mL BAC water = 1 mg/mL. Most forgiving for very low starter doses.
- 0.25 mg = 25 units · 0.5 mg = 50 units · 1 mg = 100 units
- Doses per vial: 8 at 0.25 mg, 4 at 0.5 mg, 2 at 1 mg
How to Reconstitute Semaglutide 3mg
Standard: 3 mg vial + 2 mL BAC water = 1.5 mg/mL.
- 0.25 mg = 17 units · 0.5 mg = 33 units · 1 mg = 67 units
- Alt: 3 mg + 3 mL BAC = 1 mg/mL (cleaner unit math)
How to Reconstitute Semaglutide 5mg
Most common compound vial. Standard: 5 mg + 2 mL BAC = 2.5 mg/mL — cleanest unit math at every standard dose.
- 0.25 mg = 10 u · 0.5 mg = 20 u · 1 mg = 40 u · 1.7 mg = 68 u · 2.4 mg = 96 u
- Doses per vial: 20 (0.25 mg) down to 2 (2.4 mg)
How to Reconstitute Semaglutide 10mg
Large-vial size for users on ≥1 mg doses. Standard: 10 mg + 2 mL BAC = 5 mg/mL.
- 0.25 mg = 5 u · 0.5 mg = 10 u · 1 mg = 20 u · 1.7 mg = 34 u · 2.4 mg = 48 u
- For 0.25 mg starters use 4 mL BAC → 2.5 mg/mL (more measurement margin)
Quick Reference: Semaglutide Concentration Lookup
| Vial | BAC mL | Conc. | 0.25mg | 0.5mg | 1mg | 1.7mg | 2.4mg |
|---|---|---|---|---|---|---|---|
| 2 mg | 2 mL | 1 mg/mL | 25 u | 50 u | 100 u | — | — |
| 3 mg | 2 mL | 1.5 mg/mL | 17 u | 33 u | 67 u | — | — |
| 5 mg | 2 mL | 2.5 mg/mL | 10 u | 20 u | 40 u | 68 u | 96 u |
| 5 mg | 5 mL | 1 mg/mL | 25 u | 50 u | 100 u | — | — |
| 10 mg | 2 mL | 5 mg/mL | 5 u | 10 u | 20 u | 34 u | 48 u |
| 10 mg | 4 mL | 2.5 mg/mL | 10 u | 20 u | 40 u | 68 u | 96 u |
Units on a 1 mL U100 insulin syringe.
Frequently Asked Questions
How do I reconstitute a 5mg semaglutide vial?
Standard recipe is 5mg vial plus 2 mL BAC water, yielding 2.5 mg/mL. On a U100 syringe a 0.25 mg starter is 10 units, 0.5 mg is 20, 1 mg is 40, 1.7 mg is 68, and 2.4 mg is 96. The 5mg/2mL combo gives the cleanest unit math at every standard dose.
How many doses does a 5mg semaglutide vial provide?
Reconstituted at 2.5 mg/mL, a 5mg vial yields about 20 doses at 0.25 mg, 10 at 0.5 mg, 5 at 1 mg, 2 to 3 at 1.7 mg, or roughly 2 at 2.4 mg. Practical dose count drops slightly because of syringe dead space and the 28-day discard window.
What concentration should I use for low-dose semaglutide starters?
For 0.25 mg or 0.5 mg titration doses, a more dilute mix improves measurement margin. With a 10mg vial use 4 mL BAC water (2.5 mg/mL); with a 2mg vial use 2 mL (1 mg/mL). Larger draws are more forgiving when small unit errors carry less dose impact.
Can I reconstitute semaglutide with regular sterile water?
No. Use only bacteriostatic water containing 0.9 percent benzyl alcohol, which suppresses microbial growth across multi-dose use. Plain sterile water has no preservative and would compromise sterility after the first stopper puncture, shortening the safe-use window dramatically.
What does a reconstituted semaglutide solution look like when correct?
A properly reconstituted semaglutide vial should appear completely clear and colorless once mixed, with no visible particles, cloudiness, or floating fibers. If the solution stays cloudy after gentle swirling, contains particulates, or develops discoloration, discard the vial rather than inject.