Semaglutide Reconstitution Guide: How to Reconstitute & Calculate Dose
Step-by-step guide to reconstituting Semaglutide. Learn BAC water volumes, U-100 insulin syringe unit conversions, and dosage chart calculations.
Semaglutide Reconstitution Guide: How to Reconstitute & Calculate Dose
Semaglutide is a glucagon-like peptide-1 (GLP-1) receptor agonist widely researched for its role in glycemic control and weight management. For laboratory and research applications, Semaglutide is commonly supplied as a freeze-dried (lyophilized) powder.
Reconstituting Semaglutide requires careful calculation to ensure that the volume of BAC water added translates to a clear, easily readable dosage on an insulin syringe. This guide explains the dilution math, provides standard charts, and outlines the physical steps for safe reconstitution.
The Semaglutide Dosing Schedule
In clinical settings, Semaglutide is escalated gradually to allow the body to adapt. According to the landmark STEP trials published in The Journal of the American Medical Association (JAMA), the standard escalation protocol is:
- Weeks 1–4: 0.25 mg once weekly
- Weeks 5–8: 0.50 mg once weekly
- Weeks 9–12: 1.00 mg once weekly
- Weeks 13–16: 1.70 mg once weekly
- Maintenance: 2.40 mg once weekly
Because these doses vary widely, matching your vial size to the correct amount of bacteriostatic water is essential to prevent drawing volumes that are too small to measure.
Reconstitution Math for Common Semaglutide Vials
To find your dose volume, use the following calculation process:
Here is how this applies to a 5 mg Semaglutide Vial reconstituted with 2 mL of Bacteriostatic Water (yielding a concentration of 2.5 mg/mL):
| Target Dose (mg) | Required Volume (mL) | U-100 Syringe Units |
|---|---|---|
| 0.25 mg | 0.10 mL | 10 Units |
| 0.50 mg | 0.20 mL | 20 Units |
| 1.00 mg | 0.40 mL | 40 Units |
| 1.70 mg | 0.68 mL | 68 Units |
Note: For a smaller 2 mg vial, reconstituting with 1 mL of BAC water yields a concentration of 2 mg/mL, making a 0.25 mg dose equal to 12.5 units (0.125 mL).
Practical Reconstitution Steps
- Clean Surfaces: Wipe down your preparation area. Clean the rubber stoppers of both the Semaglutide and bacteriostatic water vials with a 70% alcohol swab.
- Draw BAC Water: Pull back the plunger of your reconstitution syringe to the desired water volume (e.g., 2 mL), insert into the BAC water vial, and draw the fluid.
- Slow Addition: Insert the needle into the Semaglutide vial. Slowly inject the water along the glass side of the vial. Avoid spraying directly onto the powder, as high pressure can break the peptide structure.
- Dissolve Gently: Let the vial rest. You can roll the vial between your hands to speed up dissolution, but do not shake. Shaking introduces bubbles and can denature the protein structure.
Reconstituted Peptide Storage
After adding bacteriostatic water, Semaglutide is vulnerable to heat and degradation. Store the vial immediately in the refrigerator between 36°F and 46°F (2°C to 8°C). Properly stored vials remain stable for up to 30 days.
Use our visual peptide calculator for semaglutide to eliminate math errors and view a dynamic rendering of your syringe plunger target.