Semaglutide (20 mg Vial)
Semaglutide is a glucagon-like peptide-1 (GLP-1) receptor agonist with a prolonged half-life of approximately 7 days, approved for chronic weight management and glycemic control. The extended half-life enables once-weekly subcutaneous dosing, which is the standard clinical approach. This educational protocol presents a gradual weekly titration from 0.25 mg up to a maintenance dose of 2.4 mg over 16+ weeks, using a practical dilution for precise insulin-syringe measurements.
Detailed protocol below.
| Week | Weekly Dose | Units (per injection) (mL) |
|---|---|---|
| Weeks 1–4 | 250 mcg (0.25 mg) | 4 units (0.04 mL) |
| Weeks 5–8 | 500 mcg (0.5 mg) | 7.5 units (0.075 mL) |
| Weeks 9–12 | 1000 mcg (1.0 mg) | 15 units (0.15 mL) |
| Weeks 13–16 | 1700 mcg (1.7 mg) | 25.5 units (0.255 mL) |
| Weeks 17+ (Maintenance) | 2400 mcg (2.4 mg) | 36 units (0.36 mL) |
- •Peptide Vials (Semaglutide, 20 mg each):
- •Insulin Syringes (U-100):
- •Bacteriostatic Water (10 mL bottles): Use ~3.0 mL per vial for reconstitution.
- •Alcohol Swabs: One for the vial stopper + one for the injection site each week.
PMC – Once-Weekly Semaglutide for Weight Management: A Clinical Review
Comprehensive review of Semaglutide’s mechanism, efficacy, and safety in weight management (clinical data, half-life, GLP-1 receptor activation, weekly dosing)
View sourcePubMed – Semaglutide for Weight Loss in Obesity
Clinical trial data on Semaglutide efficacy and safety for chronic weight management
View sourceNCBI Bookshelf – Semaglutide (StatPearls)
Comprehensive pharmacology, clinical uses, dosing strategies, adverse effects, and contraindications for Semaglutide
View sourceMayo Clinic – Semaglutide (Subcutaneous Route)
Clinical guidance on Semaglutide administration, side effects, dosing, and patient information including weekly protocol
View sourcePMC – Semaglutide 2.4 mg for Weight Loss: Clinical Evidence
Evidence-based review of Semaglutide 2.4 mg weekly maintenance dosing and clinical outcomes in obesity treatment
View sourcePubMed – Cardiovascular Outcomes with Semaglutide
Long-term cardiovascular safety and benefits observed in Semaglutide clinical trials
View sourceDripdok – The Ultimate Guide to Storing Peptides
Best practices for peptide storage: temperature requirements, lyophilized vs. reconstituted storage, avoiding degradation
View sourceWittmer Rejuvenation Clinic – How to Mix Semaglutide with Bacteriostatic Water
Practical guide for reconstituting Semaglutide with bacteriostatic water, storage after reconstitution, and 28-day use guidelines
View sourcePrime Peptides – How Much Bacteriostatic Water to Add to Peptides
Guidelines for bacteriostatic water reconstitution volumes, concentration calculations, and 28-day shelf life after opening
View sourceCDC – Vaccine Administration: Subcutaneous Route
Clinical guidelines for subcutaneous injection technique, angle of insertion, site selection, and no-aspiration protocol
View sourceJohns Hopkins Arthritis Center – How to Give a Subcutaneous Injection
Step-by-step patient education on subcutaneous injection technique, site rotation, hygiene, and disposal
View sourceCDC – How to Administer Intramuscular and Subcutaneous Vaccine Injections
Comprehensive injection technique guidelines, safety protocols, sharps disposal, and site-specific recommendations
View sourceNCBI Bookshelf – Best Practices for Injection Administration
Clinical best practices for aseptic technique, injection preparation, administration, and post-injection care
View sourcePMC – Subcutaneous Drug Injection: Pharmacologic Considerations
Review of subcutaneous route pharmacology, absorption kinetics, and clinical considerations for drug delivery
View source
Educational content adapted from peptidedosages.com. Not medical advice.