Semaglutide Dosage Chart: The Escalation Steps and What They Are in Units

Semaglutide for weight management escalates weekly in steps: 0.25, 0.5, 1.0, 1.7, and 2.4 mg. The 0.25 mg step is a starting dose for tolerance rather than a therapeutic one, and each step is typically held for four weeks before increasing.

The milligram schedule is straightforward. Converting it into units on a syringe is where the mistakes happen, because that number depends entirely on how a given vial was reconstituted.

The escalation steps

Note that doses used for type 2 diabetes differ from the weight-management schedule. Reading a chart from one context into the other is a common source of confusion.

Milligrams to units

On a U-100 syringe, 100 units is 1 mL. Units measure volume, not drug — so the conversion needs the concentration.

1. Concentration: mg in the vial ÷ mL of bacteriostatic water = mg/mL.

2. Volume: dose ÷ concentration = mL.

3. Units: mL × 100.

Conversion chart — common reconstitutions

The peptide calculator does this for any combination, and the insulin syringe guide explains the underlying scale.

Watch the small numbers

At 5 mg/mL, a 0.25 mg starting dose is 5 units. That is a small draw on a 1 mL barrel, where a one-unit error is a 20% error in dose.

For the low end of the escalation, a more dilute reconstitution or a smaller-barrel syringe gives a far more forgiving reading. The trade-off is that the top of the range then risks exceeding one barrel — which is the balance to think about before adding water, not after.

Storage

Storage is the same as any reconstituted vial: 2–8 °C, protected from light, never frozen, and bounded by the shorter of peptide stability and the 28-day limit on bacteriostatic water. The bacteriostatic water guide covers the detail.

Frequently asked questions

How many units is 0.25 mg of semaglutide?

At 2.5 mg/mL it is 10 units; at 5 mg/mL it is 5 units; at 2 mg/mL it is 12.5 units. The milligram figure alone does not answer it.

Why is escalation so gradual?

Gastrointestinal effects are dose-related and most pronounced when the dose changes. The slow schedule trades speed for tolerability.

How does it compare with tirzepatide?

Different molecule, one receptor rather than two, and milligram figures that are not comparable. See the head-to-head comparison and the tirzepatide dosage chart.