Semaglutide Dosage Chart in Units: 0.25mg to 2.4mg Converted

You have your semaglutide vial. Your provider prescribed a dose in milligrams. Here is how to convert that to units on a U-100 insulin syringe.

The conversation can feel confusing at first. Your prescription says 0.25mg or 1mg or 2.4mg. Your syringe is marked in units. The bridge between these two is the concentration of your vial, which is the amount of medication dissolved in each milliliter of liquid. This page shows you exactly how to find that concentration and draw the correct dose.

Quick answer: semaglutide mg to units

Units are for a U-100 insulin syringe, where 100 units equals 1mL. Match the column to the concentration printed on your vial. If the unit number your provider gave you differs from this table, follow your provider.

Understanding your vial concentration

The concentration on your vial label is everything. Compounded semaglutide is most commonly prepared at either 2.5mg/mL or 5mg/mL. Some compounding pharmacies use other concentrations. You must know your exact concentration before drawing any dose.

Look at your vial label. You will see something like “Semaglutide 2.5mg/mL” or “Semaglutide 5mg/mL.” That number tells you how many milligrams of semaglutide are dissolved in each milliliter of solution.

If you cannot find the concentration on your label, or if the label is unclear, contact your pharmacy or your provider’s care team right away. Do not guess. Do not draw a dose based on an assumption. A clear, legible concentration on the label is also one of the signs a compounded semaglutide vial comes from a legitimate pharmacy.

Unit conversion tables for semaglutide

Below are complete conversion tables for the two most common concentrations. Find your vial concentration, then locate your prescribed dose in milligrams. The row shows you the milliliters to draw and the units on a U-100 insulin syringe.

Semaglutide at 2.5mg/mL

This is the most common compounding concentration.

Semaglutide at 5mg/mL

This concentration delivers higher doses in smaller volumes.

The standard semaglutide escalation schedule

Compounded semaglutide for weight management typically follows an escalation pattern that mirrors the FDA-approved branded semaglutide protocol for weight management^[1]. Your provider may adjust timing based on your individual response and any side effects.

This schedule shows the dose in milligrams and the corresponding units for each concentration. The same schedule sits alongside the tirzepatide tables in our GLP-1 dosing reference. Tirzepatide vials use different concentrations and a different escalation, so if you are on that medication use the tirzepatide dosage in units chart instead.

Weeks 1-4: Starting dose

0.25mg once weekly

• At 2.5mg/mL: Draw to 10 units
• At 5mg/mL: Draw to 5 units

Weeks 5-8: First increase

0.5mg once weekly

• At 2.5mg/mL: Draw to 20 units
• At 5mg/mL: Draw to 10 units

Weeks 9-12: Second increase

1mg once weekly

• At 2.5mg/mL: Draw to 40 units
• At 5mg/mL: Draw to 20 units

Weeks 13-16: Third increase

1.7mg once weekly

• At 2.5mg/mL: Draw to 68 units
• At 5mg/mL: Draw to 34 units

Week 17 and beyond: Maintenance

2.4mg once weekly (usual maintenance dose)

• At 2.5mg/mL: Draw to 96 units
• At 5mg/mL: Draw to 48 units

The FDA label for the approved product lists 2.4mg as the recommended maintenance dose, with 1.7mg as an alternative if 2.4mg is not tolerated. The current label also allows people who have tolerated 2.4mg for at least 4 weeks, and need additional weight reduction, to increase to a maximum of 7.2mg weekly, and some people continue at a lower dose. Your provider will determine your optimal dose based on your labs, tolerance, and goals. Never increase your dose on your own.

How to read a U-100 insulin syringe

A U-100 syringe holds up to 100 units of insulin in 1mL of volume. Each unit equals 0.01mL.

The syringe barrel is marked with numbers at intervals (10, 20, 30, etc.). Between each number are smaller hash marks representing single units. When you draw your dose, the top of the plunger should line up with the unit marking that matches your prescribed dose.

For example, if you are drawing 40 units, pull the plunger back until the top of the plunger is at the 40-unit line. If you are drawing 68 units, pull back to between the 60 and 70 mark, closer to 70.

If your prescribed dose does not fall exactly on a major line, it is okay. Do your best to be as accurate as possible. For doses like 68 units, the plunger will be 8 tenths of the way between the 60 and 70 marks.

The larger the volume you need to draw, the easier it is to be precise. At 96 units, for example, the plunger is close to full, and it is easier to see where you are. At 5 units, the needle is barely pulled back, so it is harder to be exact. If you struggle with small doses, mention it to your provider.

Three critical safety checks before injecting

Before you inject, verify three things. This takes 30 seconds and prevents mistakes.

Check 1: Verify the concentration. Look at your vial label right now. What concentration does it say? Write it down if it helps. Match it to the conversion table on this page. Do not trust memory. Do not guess.

Check 2: Verify your prescribed milligram dose. Check your prescription paperwork or app. What did your provider tell you to inject this week? Write it down. Match it to the correct row in the table for your vial concentration.

Check 3: Verify the unit volume. Cross-reference your mg dose with your vial concentration. Look at the table. How many units should you draw? That number should match what your syringe shows after you draw the dose. If any of these three do not line up, stop. Do not inject. Contact your pharmacy or your provider’s care team.

Injectable vs. oral semaglutide: They are measured differently

Oral semaglutide (a tablet or sublingual preparation) is not measured in units and does not use a syringe. If you are taking oral semaglutide, your prescription will specify a tablet strength like 7mg or 14mg, or a sublingual dosing instruction. The dosing information on this page does not apply to oral forms. For how the tablet and sublingual versions are prescribed and taken, see our guide to compounded oral semaglutide.

If you are unsure whether you are taking injectable or oral semaglutide, check your prescription label or packaging. If it is a vial and a syringe, it is injectable. If it is a tablet, capsule, or strip, it is oral. Contact your pharmacy or your provider’s care team if the form is unclear.

What to check before you start a semaglutide vial

If you are choosing a provider for compounded semaglutide, a few checks up front make the unit math much easier later.

At most telehealth programs, you complete an online intake covering your health history and current medications, and a licensed provider decides whether semaglutide is appropriate for you. The steps are outlined in how to get a GLP-1 prescription online. If a provider does prescribe it, the prescription usually specifies a starting dose (often 0.25mg) and an escalation schedule (often increasing every 4 weeks).

Before you commit to a provider, check that:

• The prescriber is licensed in your state. You can look up the license on your state’s medical or nursing board website.
• The pharmacy is state-licensed, and you know whether it is a 503A compounding pharmacy or a 503B outsourcing facility.
• The vial label shows the concentration and a beyond-use date.
• You get written instructions in both milligrams and units for your vial’s concentration, not just a milligram dose.
• U-100 syringes are supplied, or you know where to get them.
• You know who to call with a dosing question between visits.

Some programs also offer oral or sublingual semaglutide, which is dosed by strength rather than units. If you are weighing the two forms, ask how each is dosed and monitored. If you are still deciding, how to get compounded semaglutide walks through what happens between the prescription and the vial arriving.

Cost is the other thing to pin down. Ask what the monthly price includes: medication, provider visits, labs, syringes, shipping, any membership fee, and the cancellation terms. Then ask what happens at higher doses. Some programs charge more as the dose goes up, and some switch you to a different concentration, which changes your unit numbers. The compounded semaglutide cost page explains what typical pricing depends on.

A licensed provider makes the final decision about whether semaglutide is right for you. If you are prescribed it, you should leave with clear dosing instructions that match your vial concentration. Transformation Health does not accept payment from providers. How we make money.

Citations

[1] Wilding JPH, et al. “Once-Weekly Semaglutide in Adults with Overweight or Obesity.” New England Journal of Medicine. 2021;384(11):989-1002. https://pubmed.ncbi.nlm.nih.gov/33567185/