Compounded Semaglutide Dosage Chart: Reconstitution Made Simple

Introduction

Some compounding pharmacies ship semaglutide as a pre-mixed liquid in a glass vial. Others ship a freeze-dried powder with a separate vial of bacteriostatic water that the patient mixes at home. This second format is called lyophilized or “powder” semaglutide. It needs to be reconstituted before the first dose.

Reconstitution sounds intimidating. It is not. You inject a specific amount of bacteriostatic water into the powder vial, swirl gently, and you have a liquid drug at a known concentration. The math is the same as for any compounded vial. The chart below covers every common shipment configuration and every titration step from 0.25 mg through 2.4 mg.

At TrimRx, we believe that understanding your options is the first step toward a more manageable health journey. You can take the free assessment quiz if you’re ready to see whether a personalized program is a fit for you.

What Is in a Typical Compounded Semaglutide Shipment?

A standard shipment includes one or two glass vials of powdered semaglutide, a separate vial of bacteriostatic water, U-100 insulin syringes, alcohol pads, and a dosing label. Powder vials are usually labeled by total drug content: 2 mg, 5 mg, 10 mg, or 15 mg. The label does not show concentration because the concentration is set by the patient at reconstitution.

Quick Answer: Reconstitution concentration depends only on how much water you add to a fixed amount of powder

Pre-mixed liquid shipments arrive in 2 mL or 3 mL vials and the concentration is printed on the label. These do not need reconstitution. If your vial is liquid and labeled “2.5 mg/mL,” skip the reconstitution section and go straight to the dosing chart.

Powder semaglutide is more common with U.S. 503A pharmacies because the powder is more stable in shipping, especially in summer heat. The trade-off is the extra step at home.

How Do I Reconstitute the Powder Vial?

Take the powder vial out of the fridge and let it reach room temperature for 5 to 10 minutes. Wipe both rubber stoppers (the powder vial and the bacteriostatic water vial) with an alcohol pad. Draw the required amount of bacteriostatic water into a syringe.

Push the syringe needle into the powder vial at an angle so that the water runs down the glass wall, not directly onto the powder cake. Inject slowly. Do not shake. Roll or swirl the vial between your palms until the powder dissolves. This usually takes about 30 seconds. The final liquid should be clear and colorless.

Once dissolved, label the vial with the date and concentration. Store in the fridge between 36 and 46 F.

What Concentration Should I Mix To?

The concentration depends on how much water you add to the powder vial. The pharmacy will print a specific instruction on the label, but the math is universal: concentration (mg/mL) = total drug (mg) / water added (mL).

Common mixes:

• 2 mg powder + 1 mL water = 2 mg/mL
• 5 mg powder + 2 mL water = 2.5 mg/mL (most common)
• 5 mg powder + 1 mL water = 5 mg/mL
• 10 mg powder + 2 mL water = 5 mg/mL
• 10 mg powder + 1 mL water = 10 mg/mL

The 2.5 mg/mL mix is the default for new patients because every titration step lands on a round unit number. Higher concentrations like 5 or 10 mg/mL are used for maintenance to reduce the injection volume.

What Does the Dosage Chart Look Like at 2.5 mg/mL?

This is the most common concentration for compounded semaglutide. At 2.5 mg/mL:

• 0.25 mg = 10 units = 0.1 mL
• 0.5 mg = 20 units = 0.2 mL
• 1.0 mg = 40 units = 0.4 mL
• 1.7 mg = 68 units = 0.68 mL
• 2.0 mg = 80 units = 0.8 mL
• 2.4 mg = 96 units = 0.96 mL

Draw the syringe to the unit count for your current titration step. Most U-100 1 mL syringes have markings every 2 units, so the 68-unit and 96-unit doses are easy to draw without rounding.

A 5 mg vial reconstituted to 2.5 mg/mL contains roughly 20 weeks of 0.25 mg starting doses or 10 weeks of 0.5 mg, dropping to 2 weeks at the top 2.4 mg dose.

What Does the Chart Look Like at 5 mg/mL?

Some patients are switched to 5 mg/mL during maintenance to cut the injection volume in half. At 5 mg/mL:

• 0.25 mg = 5 units = 0.05 mL
• 0.5 mg = 10 units = 0.1 mL
• 1.0 mg = 20 units = 0.2 mL
• 1.7 mg = 34 units = 0.34 mL
• 2.0 mg = 40 units = 0.4 mL
• 2.4 mg = 48 units = 0.48 mL

The lower volumes can be hard to see in a 1 mL syringe. A 0.3 mL or 0.5 mL low-dose U-100 syringe makes reading easier.

Key Takeaway: At 2.5 mg/mL, 0.25 mg equals 10 units on a U-100 insulin syringe

What Does the Chart Look Like at 10 mg/mL?

A 10 mg/mL concentration is sometimes used for maintenance phase. It is too concentrated for the starting 0.25 mg dose, which would require drawing just 2.5 units.

At 10 mg/mL:

• 1.0 mg = 10 units = 0.1 mL
• 1.7 mg = 17 units = 0.17 mL
• 2.0 mg = 20 units = 0.2 mL
• 2.4 mg = 24 units = 0.24 mL

A 10 mg vial reconstituted to 10 mg/mL is a 4-week supply at 2.4 mg or a 5-week supply at 2.0 mg.

What Is Bacteriostatic Water and Why Do I Have to Use It?

Bacteriostatic water is sterile water that contains 0.9% benzyl alcohol as a preservative. The preservative prevents bacterial growth inside the vial after the rubber stopper has been pierced. This matters because compounded vials are punctured multiple times during the dosing period.

Sterile water without preservative is meant for single-use mixes that are injected immediately. Saline is not interchangeable either because the sodium chloride changes the osmolarity. The pharmacy will only send bacteriostatic water with the kit. Do not substitute.

Bacteriostatic water has a shelf life of 28 days after the first puncture, which matches the typical USP <797> beyond-use date for compounded sterile preparations stored in the fridge.

How Does TrimRx Prescribe and Dispense Compounded Semaglutide?

TrimRx ships through licensed U.S. 503A and 503B compounding pharmacies. Most kits arrive as a 5 mg powder vial plus 2 mL of bacteriostatic water, which reconstitutes to 2.5 mg/mL. The dosing label shows the unit count for your current titration step.

A free assessment quiz determines eligibility and starting dose. The personalized treatment plan accounts for prior GLP-1 history, BMI, and tolerability. Reconstitution instructions are included with every powder shipment.

Bottom line: Once reconstituted, the vial is stable in the fridge for 28 days per typical USP guidance

FAQ

What Happens If I Add the Wrong Amount of Bacteriostatic Water?

The concentration changes proportionally. If you added 2 mL instead of 1 mL to a 5 mg vial, your concentration is 2.5 mg/mL instead of 5 mg/mL, and you need to draw twice as many units to get the same dose. Recalculate before the first injection. If you are unsure, call the pharmacy.

How Long Is Reconstituted Semaglutide Stable?

Most compounding pharmacies set a 28-day beyond-use date for reconstituted semaglutide stored in the refrigerator. This follows USP <797> guidance for multi-dose preservative-containing preparations. After 28 days, discard the vial even if drug remains.

Can I Reconstitute the Vial at Room Temperature?

Yes. Reconstitution happens at room temperature. Storage is in the fridge. If the vial has been refrigerated, let it warm up for a few minutes before injecting to reduce sting.

Should I Shake the Vial After Adding Water?

No. Swirl or roll gently. Shaking creates foam and can degrade the peptide. The drug dissolves on its own with gentle motion in under a minute.

What If the Solution Looks Cloudy?

A clear, colorless solution is normal. Cloudiness, particles, or color change means the vial is compromised. Do not inject. Contact the pharmacy for a replacement.

Why Does the Pharmacy Not Just Ship Pre-mixed Liquid?

Powder is more stable in shipping. Liquid semaglutide degrades faster at room temperature, which matters during a 2-day FedEx route through a hot warehouse. Powder gives the pharmacy a longer beyond-use date on the unmixed vial.

Can I Use a Different Syringe Size?

Yes, within reason. A 0.3 mL U-100 syringe is best for doses under 30 units. A 0.5 mL is good for mid-range. A 1 mL is needed for doses above 50 units. All three measure in the same unit calibration.

Disclaimer: This content is for informational purposes only and does not constitute medical advice. It is not intended to diagnose, treat, cure, or prevent any disease or condition. Individual results may vary. Always consult a qualified healthcare professional before starting any weight loss program or medication.

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