How Survodutide Is Reconstituted
Survodutide (BI 456906) — a dual glucagon/GLP-1 receptor agonist — ships as a lyophilized powder. Trial protocols and community sources document reconstitution with bacteriostatic water before use.
Once-weekly dosing and a multi-step titration make precise reconstitution central to the protocol. This guide reports mixing, measuring across the full dose range, and documented storage.
Research-context information only. Survodutide is an investigational drug not approved by the FDA. Protocols, doses, and reactions reported below come from published clinical trials and self-reported community sources. This article reports what has been documented, not what should be done. Possession or use of investigational drugs outside an authorized clinical trial may be illegal in your jurisdiction. Consult a licensed physician for personal medical decisions.
New to bacteriostatic water? Start with what it is, how much to use per vial, and how long it lasts — or see the full Bacteriostatic Water Guide.
Materials Documented in Reconstitution Protocols
- Survodutide lyophilized vial (typically 5mg or 10mg)
- Bacteriostatic water (BAC water) — not sterile water, not saline
- Insulin syringes — 1mL (100 unit), 29-31 gauge
- Alcohol swabs — for cleaning vial tops
- A clean, flat workspace
Why bacteriostatic water? It contains 0.9% benzyl alcohol that suppresses bacterial growth. With once-weekly dosing and vials that span multiple weeks (especially during titration), the 28-day reconstituted shelf life of BAC water is the documented standard.
Documented Reconstitution Steps
Step 1: Surface Preparation
Standard reconstitution practice is to wipe both vial tops (survodutide and BAC water) with alcohol swabs and allow 10 seconds to air dry.
Step 2: Drawing Bacteriostatic Water
A fresh insulin syringe is used to draw the BAC water. The most-cited dilution for 5mg vials is 1mL of BAC water — it keeps all titration doses measurable on an insulin syringe without exceeding 100 units.
Step 3: Adding Water to the Peptide Vial
Trial protocols describe inserting the needle at an angle, aiming at the glass wall — not directly at the powder. The water trickles down the side of the vial.
Step 4: Dissolution
Standard reconstitution practice is to swirl the vial gently with a slow rotating motion. Trial protocols specify gentle swirling rather than shaking. Properly manufactured survodutide is documented to dissolve within 1-2 minutes into a clear, colorless solution.
Step 5: Storage
Reconstituted research peptides are typically stored at 36-46°F (2-8°C) in published stability studies. Stability with bacteriostatic water is documented at up to 28 days.
Dilution Charts
5mg Vial
| BAC Water | Concentration | 0.3mg | 0.6mg | 1.2mg | 1.8mg | 2.7mg | 3.6mg | 4.8mg |
|---|---|---|---|---|---|---|---|---|
| 1 mL | 5 mg/mL | 6 units | 12 units | 24 units | 36 units | 54 units | 72 units | 96 units |
| 2 mL | 2.5 mg/mL | 12 units | 24 units | 48 units | 72 units | — | — | — |
Most-cited dilution: 1mL BAC water for 5mg vials. This places the maintenance dose (4.8mg = 96 units) within syringe range. At 2mL, higher titration doses exceed 100 units.
10mg Vial
| BAC Water | Concentration | 0.6mg | 1.2mg | 2.4mg | 3.6mg | 4.8mg |
|---|---|---|---|---|---|---|
| 1 mL | 10 mg/mL | 6 units | 12 units | 24 units | 36 units | 48 units |
| 2 mL | 5 mg/mL | 12 units | 24 units | 48 units | 72 units | 96 units |
10mg vials are commonly cited for the maintenance phase — a single vial at 4.8mg/week provides about 2 weeks of dosing.
The Math
Concentration = Peptide Amount (mcg) ÷ Water Added (mL)
Units to inject = Desired Dose (mcg) ÷ Concentration (mcg/mL) × 100
Example: 5,000mcg vial + 1mL water = 5,000mcg/mL. For a 1.2mg (1,200mcg) dose: 1,200 ÷ 5,000 × 100 = 24 units.
The Reconstitution Calculator automates the math.
