Weight & metabolism

Semaglutide (Ozempic, Wegovy, Rybelsus): benefits, results & how to take it

FDA-approved Checked against official sources Oct 16, 2026

Quick facts

What it is: a GLP-1 medicine for type 2 diabetes (Ozempic, Rybelsus) and weight management/heart-risk reduction (Wegovy).
Status: FDA-approved, prescription only.
How it's taken: injections are once weekly, same day each week. Tablets are once daily in the morning on an empty stomach.
Evidence: strong, from large randomized trials.
Most common side effects: nausea and diarrhea, mostly while the dose is being increased.

What is Semaglutide?

Semaglutide is a lab-made version of the gut hormone GLP-1. It's sold under brand names including Ozempic and Rybelsus (type 2 diabetes) and Wegovy (weight management).

Is Semaglutide FDA-approved?

FDA-approved prescription medicine. Ozempic (injection) and Rybelsus are labeled for blood-sugar control in adults with type 2 diabetes, and Ozempic also for lowering heart-event risk in some of those adults. Wegovy is labeled for long-term weight management in certain adults and children 12+, and for lowering major heart-event risk in adults with heart disease and overweight or obesity. Sources: Drugs@FDA Ozempic, Rybelsus, Wegovy. Exact indications are in the current FDA label.

Semaglutide dose schedule & timing: what the FDA label says

Your prescriber sets your dose. This is a summary of the official FDA label to help you follow along, not a plan to start, change, or stop anything.

Ozempic (injection) — FDA label on DailyMed

Once weekly, on the same day each week, any time of day, with or without meals.
Starts at 0.25 mg weekly for 4 weeks (a starter dose, not meant to control blood sugar), then 0.5 mg weekly.
If more control is needed, it can go to 1 mg, then 2 mg weekly, each after at least 4 weeks on the current dose.
Missed dose: take it within 5 days. If more than 5 days have passed, skip it and resume on your usual day.

Wegovy (injection or tablet) — FDA label on DailyMed

Injection: once weekly, same day each week. The label's escalation runs 0.25 mg (weeks 1–4) → 0.5 mg (5–8) → 1 mg (9–12) → 1.7 mg (13–16). The usual recommended maintenance dose is 2.4 mg weekly, and the label gives options by indication.
Tablet: once daily in the morning on an empty stomach, with up to 4 oz of water. Wait at least 30 minutes before eating, drinking, or taking other oral medicines. Starts at 1.5 mg daily and steps up every 30 days, per the label, to a maintenance dose of 25 mg daily.
If a dose step isn't tolerated, the label lets the prescriber delay the next increase by 4 weeks.

Rybelsus (tablet) — FDA label on DailyMed

Once daily in the morning on an empty stomach, with up to 4 oz of plain water. Swallow whole.
Wait at least 30 minutes before eating, drinking, or taking other oral medicines.
3 mg daily for 30 days (a starter dose), then 7 mg daily. It can go to 14 mg daily if more control is needed.
Rybelsus and Ozempic tablets are not interchangeable mg-for-mg.

What the research shows

STEP 1 (NEJM, 2021, PMID 33567185): an RCT in adults with overweight or obesity. Over 68 weeks, weight changed by −15.3 kg with semaglutide vs. −2.6 kg with placebo, alongside lifestyle intervention. Nausea and diarrhea were the most common side effects.
SELECT (NEJM, 2023, PMID 37952131): 17,604 people with heart disease and overweight/obesity but no diabetes. Major cardiovascular events occurred in 6.5% on semaglutide vs. 8.0% on placebo.
Kidney disease trial (Nature Medicine, 2026, PMID 42823485): a 106-person RCT exploring how it may protect the kidneys in type 2 diabetes. Covered in Issue #1.

New to these terms? See the glossary.

Semaglutide FAQ

How often do you take semaglutide?

Ozempic and Wegovy injections are taken once weekly on the same day each week. Rybelsus and Wegovy tablets are taken once daily in the morning on an empty stomach.

What is the semaglutide dose schedule?

Per the FDA labels, injections start at 0.25 mg weekly for 4 weeks and increase in steps at least 4 weeks apart. Your prescriber decides your dose.

When should I take Rybelsus?

The label says once daily in the morning on an empty stomach with up to 4 ounces of plain water, then wait at least 30 minutes before eating, drinking, or other oral medicines.

What if I miss an Ozempic dose?

The label says take it within 5 days. If more than 5 days have passed, skip it and resume your regular day. Check with your prescriber or pharmacist.

Is Ozempic the same as Wegovy?

Both contain semaglutide, but they're separate FDA-approved products with different indications and dose schedules.

Not medical advice. Education only. We don't sell anything or tell you what to take. Label doses are there so you can follow along with your prescriber. Talk to a licensed clinician about your health.

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