How Much BAC Water for Retatrutide?
- Dylan
The amount of bacteriostatic (BAC) water needed to prepare Retatrutide depends on the vial size and desired concentration. Generally, 1–2 mL may be used, but always follow verified, product-specific preparation instructions. The amount of water you add doesn’t affect the medication amount in the vial. However, it affects how many units you have to draw with a U-100 insulin syringe.
Common Mixing Ratios
The following is a summary of the amounts of BAC water required for each Retatrutide vial size for easy calculation of the dosage scale:
| Vial Size | BAC Water Added | Concentration | Units for 1 mg |
|---|---|---|---|
| 5mg Vial | 1.0 mL | 5.0 mg/mL | 20 Units |
| 5mg Vial | 2.0 mL | 2.5 mg/mL | 40 Units |
| 10mg Vial | 2.0 mL | 5.0 mg/mL | 20 Units |
| 12mg Vial | 2.4 mL | 5.0 mg/mL | 20 Units |
| 30mg Vial | 3.0 mL | 10.0 mg/mL | 10 Units |
The “10 Units = 1 mg” Rule of Thumb
Many researchers prefer to mix their vials so that every 10 units on the syringe equals exactly 1 mg of Retatrutide.Â
To achieve this simple math, add 1 mL of BAC water for every 10 mg of peptide:Â
- For a 10 mg vial, add 1.0 mL of water.
- For a 20 mg vial, add 2.0 mL of water.
- For a 30 mg vial, add 3.0 mL of water.Â
For more information, see our guide on How to Mix Reta with BAC Water?
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Step-by-Step Reconstitution Protocol
- Wipe the top of the BAC water vial and the Retatrutide vial with the alcohol swab.
- Draw the correct amount of BAC water using a syringe from the water vial.
- Insert the needle into the Retatrutide vial and direct the flow along the inner glass walls instead of spraying the powder.Â
- The vacuum in the vial may cause the water to go in too fast, so you should push the plunger in slowly.
- Swirl or roll the vial in your hands gently until the mixture becomes clear.Â
- Store the solution refrigerated at 2°C – 8°C (36°F – 46°F).
Willam D.
Dylan writes educational guides about bacteriostatic water, sterile water, and injectable diluents for Hospirabacteriostaticwater.com. His articles are based on current U.S. product labeling, including DailyMed, and are for general information only.
“This article is for general information only and is not medical advice. Always follow the product and medication labeling and consult a healthcare professional.”
All Vial Sizes
Facts About Hospira Bac Water
- Hospira, Inc. (a Pfizer company)
- Benzyl Alcohol 0.9% (9 mg/mL)
- 30 mL multiple-dose vial
- Store at Controlled Room Temperature
