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Ozempic, Wegovy, Rybelsus and compounded semaglutide, by the label and by the numbers.

The semaglutide reference: how Ozempic, Wegovy, the semaglutide tablets and compounded semaglutide differ, a titration planner built from the label schedules, a units-to-mg converter for vials, the missed-dose rules, a side-effect view from STEP data, and self-pay prices with the date we checked them.

Calculators
5
Guides
18
Byline: FormBlends editorial team. Every number cites a primary source. No reviews, ratings or endorsements.

Interactive

Calculators

Each runs in your browser, shows its formula, and prints a dated assumptions note. Nothing you type leaves the page.

Reading

Guides

Written for people doing the arithmetic themselves: where the mistakes happen, and how to check your own work.

01

Compare

Ozempic vs Wegovy: same semaglutide, different labels

Every difference that matters between the two semaglutide injections, from the label: indications and their dates, escalation and maximum dose, missed-dose rules, pen design, adverse reaction rates in their own trials, and self-pay price.

Updated September 4, 2026

02

Compare

Wegovy vs compounded semaglutide: what is actually different

An honest side-by-side from a site whose parent company dispenses compounded semaglutide: regulatory status, what was tested, how the dose is measured, what the label guarantees and a compounded vial does not, and where price fits.

Updated September 4, 2026

04

Guides

Compounded semaglutide units to mg: how the converter works

Why a compounded semaglutide vial needs arithmetic that a brand pen does not, how the converter turns a concentration and a prescribed dose into syringe units and the nearest mark, and the errors it is built to catch.

Updated September 4, 2026

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Sections

Four products, one molecule, different rules

Ozempic and Wegovy are the same semaglutide in different pens with different label schedules, maximum doses and missed-dose rules. The tablets (Rybelsus, Ozempic tablets and Wegovy tablets) add a daily routine with a 30-minute fasting window. Compounded semaglutide is none of these: it is not FDA approved, not interchangeable with them, and comes in vials whose concentration changes from fill to fill. Every page on this site says which product it is talking about.

How the numbers are sourced

Label facts cite the FDA prescribing information by revision date and DailyMed set id. Trial results cite the PubMed id of the primary publication. Prices cite Novo Nordisk's own price sheet with the date we read it. If a number is not on this site, we could not verify it. Pages carry an updated date and change when the label, the price or the evidence does.