Ozempic vs Wegovy: Dosing Differences Explained

Last updated: June 2026

Ozempic and Wegovy are the same active drug — semaglutide — but they are not interchangeable, because their approved dose ladders end at different numbers: Ozempic tops out at 2 mg weekly for type 2 diabetes, while Wegovy climbs one rung higher to 2.4 mg weekly for weight management. Wegovy also adds a 1.7 mg step that Ozempic does not have, so the two brands run on overlapping but distinct schedules.

Have a compounded semaglutide vial and a target dose? Convert any milligram dose to exact mL and U-100 syringe units in seconds.

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TL;DR — key takeaways

Same molecule. Ozempic and Wegovy both contain semaglutide; the difference is the approved indication, the top dose, and the pen strengths sold.
Different ceilings. Ozempic's maximum is 2 mg/week (type 2 diabetes); Wegovy's maximum is 2.4 mg/week (chronic weight management).
Different ladders. Wegovy inserts a 1.7 mg step between 1 mg and 2.4 mg; Ozempic jumps straight from 1 mg to 2 mg.
Units follow concentration. If you draw from a compounded vial rather than a pen, the number of syringe units depends on the vial's mg/mL strength, not on the brand name.

Why two brands of one drug exist

Semaglutide is a glucagon-like peptide-1 (GLP-1) receptor agonist that mimics the body's GLP-1 hormone to trigger glucose-dependent insulin release, slow gastric emptying, and blunt appetite. The molecule resists rapid breakdown and binds reversibly to albumin, which is why it has a half-life measured in days and is dosed once weekly. Novo Nordisk markets that single molecule under two brands: Ozempic, approved for glycemic control in type 2 diabetes, and Wegovy, approved for chronic weight management. Rybelsus is the oral tablet form of the same drug.

Because the weight-management indication was studied at a higher target dose, Wegovy carries an extra rung. The 2.4 mg maximum reflects the dose used in the STEP weight-loss trials, while the 2 mg Ozempic maximum reflects the SUSTAIN FORTE diabetes data showing 2 mg beat 1 mg on blood-sugar control. Same drug, two evidence bases, two ceilings.

The two dose ladders side by side

Both brands start at 0.25 mg once weekly — a deliberately sub-therapeutic priming dose — and increase no sooner than every 4 weeks so the gut can adapt. Where they diverge is the top half of the ladder.

Property	Ozempic	Wegovy
Active drug	Semaglutide	Semaglutide
Approved use	Type 2 diabetes	Chronic weight management
Starting dose	0.25 mg / week	0.25 mg / week
Min step interval	4 weeks	4 weeks
Titration steps	0.25, 0.5, 1, 2	0.25, 0.5, 1, 1.7, 2.4
Maximum dose	2 mg / week	2.4 mg / week
Has a 1.7 mg step?	No	Yes
Route	Subcutaneous	Subcutaneous

Figures reflect the FDA-approved Ozempic and Wegovy labels. Pens deliver these fixed doses for you; compounded semaglutide in a multi-dose vial does not — you draw the volume yourself, which is where the unit math below matters. Always follow your prescriber's plan.

The titration staircases, visualised

The two ladders sit on top of each other for the first three rungs, then Wegovy branches higher with an extra step. The shape is the same — hold each level at least four weeks — but the destinations differ.

Turning a dose into syringe units

Brand-name pens hide the arithmetic — you dial a dose and inject. But if you hold a compounded vial, you read units on a U-100 syringe, where 1 mL = 100 units. The conversion is always the same: find the concentration in mg/mL, divide your dose by it to get mL, then multiply by 100 for units. The brand is irrelevant to this maths; only the vial strength and your dose matter.

Worked example 1 — a 0.5 mg dose

Vial labelled 2.5 mg/mL, prescribed dose 0.5 mg/week.

0.5 mg ÷ 2.5 mg/mL = 0.2 mL. 0.2 mL × 100 = 20 units.

Draw 20 units on a U-100 syringe.

Worked example 2 — the Ozempic ceiling (2 mg)

Vial labelled 5 mg/mL, dose 2 mg/week (Ozempic's maximum).

2 mg ÷ 5 mg/mL = 0.4 mL. 0.4 mL × 100 = 40 units.

Draw 40 units — two-fifths of a 1 mL syringe.

Worked example 3 — the Wegovy ceiling (2.4 mg)

Same 5 mg/mL vial, dose 2.4 mg/week (Wegovy's maximum).

2.4 mg ÷ 5 mg/mL = 0.48 mL. 0.48 mL × 100 = 48 units.

Draw 48 units — 8 units more than the 2 mg dose above.

Worked example 4 — the Wegovy-only 1.7 mg step

Same 5 mg/mL vial, dose 1.7 mg/week (no Ozempic equivalent).

1.7 mg ÷ 5 mg/mL = 0.34 mL. 0.34 mL × 100 = 34 units.

Draw 34 units — the rung Ozempic skips entirely.

Worked example 5 — same dose, different vial

A 1 mg dose from a 2.5 mg/mL vial vs a 5 mg/mL vial.

1 ÷ 2.5 = 0.4 mL × 100 = 40 units. 1 ÷ 5 = 0.2 mL × 100 = 20 units.

Double the concentration, half the units — for the identical milligram dose.

Dose-to-units reference chart

Every approved semaglutide dose, shown as units on a U-100 syringe at two common compounded concentrations. Confirm against your own vial label before drawing.

Dose (brand)	At 2.5 mg/mL	At 5 mg/mL
0.25 mg (both, start)	10 units	5 units
0.5 mg (both)	20 units	10 units
1 mg (both)	40 units	20 units
1.7 mg (Wegovy only)	68 units	34 units
2 mg (Ozempic max)	80 units	40 units
2.4 mg (Wegovy max)	96 units	48 units

Notice that at 2.5 mg/mL the larger doses approach or fill a whole 1 mL syringe (96 units for 2.4 mg). If your draw is close to or above 100 units, a higher-concentration vial keeps the volume manageable. These figures apply only to compounded vials drawn by hand — pre-filled Ozempic and Wegovy pens meter the dose internally.

How this is calculated

Each number here uses two facts only: a U-100 syringe holds 100 units per mL, and concentration is dose divided by volume. There is no brand-specific constant — the arithmetic is identical whether the label says Ozempic, Wegovy, or compounded semaglutide. The calculators on this site automate exactly this so you can cross-check against the chart above. This is the maths behind a dose your prescriber sets; it is not medical advice, and it does not change which brand or dose is appropriate for you.

Frequently asked questions

Are Ozempic and Wegovy the same drug?

Yes — both contain semaglutide. They differ in approved indication (diabetes vs weight management), the maximum dose (2 mg vs 2.4 mg), and the pen strengths sold. The molecule injected is the same.

Can I get a 2.4 mg dose from Ozempic?

Ozempic pens are not built to deliver 2.4 mg, and 2.4 mg is the Wegovy weight-management dose, not an Ozempic diabetes dose. Dosing decisions belong to your prescriber; do not improvise a higher dose from a pen designed for a lower ceiling.

Why does Wegovy have a 1.7 mg step but Ozempic doesn't?

Wegovy's slower, longer ladder gives the gut more time to adapt on the way to the higher 2.4 mg target. Ozempic's diabetes ladder jumps from 1 mg straight to 2 mg, so it never uses 1.7 mg.

Do I draw more units for Wegovy than Ozempic?

Only because Wegovy's top dose (2.4 mg) is larger than Ozempic's (2 mg). For any identical milligram dose, the units are the same — units depend on the vial concentration, not the brand.

Sources

This guide is for general educational purposes only and does not constitute medical advice. Always follow your prescriber’s specific instructions and consult a qualified clinician before changing any protocol.