Lab arithmeticSemaglutideFDA-approved
Semaglutide 20 mg: dosing evidence and reconstitution math
A 20 mg vial of Semaglutide mixed with 2 mL of diluent is 10 mg/mL, so 10 units on a U-100 syringe (0.1 mL) contain 1 mg.
Is there an established dose?
Semaglutide has a published dose schedule (fda label); we reproduce it, with its source, on a separate page.
- Semaglutide 2.4 mg: Wegovy Label Escalation Schedule (2026)
- OZEMPIC, RYBELSUS on Drugs@FDA (NOVO)
- Semaglutide profile: FDA status, research volume and registered trials.
20 mg vial concentration table
Concentration = vial content ÷ diluent volume. A U-100 insulin syringe holds 1 mL in 100 units, so 1 unit = 0.01 mL.
| Diluent | Concentration | Per 10 units (0.1 mL) | Per 1 unit |
|---|---|---|---|
| 1 mL | 20 mg/mL | 2 mg | 200 mcg |
| 2 mL | 10 mg/mL | 1 mg | 100 mcg |
| 3 mL | 6.667 mg/mL | 667 mcg | 66.7 mcg |
| 5 mL | 4 mg/mL | 400 mcg | 40 mcg |
Arithmetic only; it assumes the vial contains exactly what the label states. Independent tests often find vials under- or over-filled, which is why a lot's certificate of analysis matters.
Syringe units for a given amount
Units on a U-100 syringe needed to draw each amount from this 20 mg vial, by diluent volume. The amounts are fractions of the vial (1/50, 1/20, 1/10, 1/5), not dose suggestions.
| Amount | 1 mL diluent | 2 mL diluent | 3 mL diluent |
|---|---|---|---|
| 400 mcg | 2 units | 4 units | 6 units |
| 1 mg | 5 units | 10 units | 15 units |
| 2 mg | 10 units | 20 units | 30 units |
| 4 mg | 20 units | 40 units | 60 units |
Units = amount ÷ concentration × 100. Draws above 100 units exceed a 1 mL syringe.
What the research covers
A PubMed search for "semaglutide"[tiab] returned 5,707 records (5,279 from the last five years), 341 indexed as clinical trials when checked on October 2026.
- Safety of Semaglutide.
- Semaglutide lowers body weight in rodents via distributed neural pathways.
- Comparative efficacy, safety, and cardiovascular outcomes with once-weekly subcutaneous semaglutide in the treatment of type 2 diabetes: Insights from the SUSTAIN 1-7 trials.
- Efficacy and safety of once-daily oral orforglipron compared with oral semaglutide in adults with type 2 diabetes (ACHIEVE-3): a multinational, multicentre, non-inferiority, open-label, randomised, phase 3 trial.
- Efficacy and Safety of Semaglutide for Weight Loss in Obesity Without Diabetes: A Systematic Review and Meta-Analysis.
ClinicalTrials.gov lists 788 registered studies (search), including:
- Investigation of the Effect of Upper Gastrointestinal Disease on the Pharmacokinetics of Oral Semaglutide in Subjects With Type 2 Diabetes.
- A Research Study Looking at How Oral Semaglutide Works in People With Type 2 Diabetes in Saudi Arabia, as Part of Local Clinical Practice
- HMB Plus Vitamin D to Preserve Muscle in Older Adults Starting Semaglutide
- Optimizing Portal Hypertension With TIPS and Interval Metabolic Surgery for Advanced Liver Disease
Where research vials are listed
14 suppliers in our directory list Semaglutide (A–Z): Amino Amigos, BioGenix Peptides, Extreme Peptides, LotusPeptide, Paramount Peptides, Peptide Partners, Peptide Worldwide, Polaris Peptides, and 6 more. Across 12 vendors we checked, the median in-stock price was $6.00/mg (range $1.23–$13.00); see Semaglutide prices per mg. A listing is not a quality endorsement; ask for a lot-specific certificate of analysis.
Storage & handling
Follow the storage statement on the product sheet or certificate of analysis. Lyophilized (freeze-dried) peptides are generally kept cold, dry and away from light; once reconstituted, stability is shorter and depends on the compound and diluent. Bacteriostatic water contains 0.9% benzyl alcohol as a preservative; sterile water does not.
Frequently asked questions
How much bacteriostatic water for a 20 mg Semaglutide vial?
The diluent volume only sets the concentration: 1 mL gives 20 mg/mL, 2 mL gives 10 mg/mL and 3 mL gives 6.667 mg/mL. Smaller volumes are more concentrated, so each syringe unit holds more.
How much Semaglutide is in 10 units?
At 2 mL of diluent, 10 units (0.1 mL) of a 20 mg vial contain 1 mg; at 1 mL they contain 2 mg.
What is the dose of Semaglutide?
Semaglutide has a published dose schedule (fda label); we reproduce it, with its source, on a separate page.
Related pages
Peptide calculator BAC water calculator Semaglutide prices per mg Weight loss & GLP-1 protocols