Ozempic is semaglutide approved for adults with type 2 diabetes, and every number on its label comes from people with diabetes [1]. Those trials weren't built to measure weight loss, but each one reported it, and the label prints the results. They're a useful guide if you take Ozempic for diabetes. If weight is your main goal, the better guide is Wegovy, the same molecule studied and labeled for weight.
In its diabetes trials, people lost about 7 to 14 lb
The label reports average weight change in six trials of adults with type 2 diabetes, lasting 30 to 56 weeks. On Ozempic, the average loss ranged from 7.1 lb (3.2 kg) to 14.1 lb (6.4 kg), depending on the trial and the dose tested [1]. Most groups started at an average of about 195 to 220 lb, so that's roughly 3% to 6.5% of body weight by our arithmetic.
| Trial design | Length | Group | Average change | Share of body weight |
|---|---|---|---|---|
| Ozempic alone vs placebo | 30 weeks | Placebo | −2.6 lb (−1.2 kg) | −1.3% |
| Ozempic alone vs placebo | 30 weeks | Ozempic 0.5 mg | −8.4 lb (−3.8 kg) | −4.2% |
| Ozempic alone vs placebo | 30 weeks | Ozempic 1 mg | −10.4 lb (−4.7 kg) | −4.9% |
| Added to metformin, vs sitagliptin | 56 weeks | Sitagliptin | −3.7 lb (−1.7 kg) | −1.9% |
| Added to metformin, vs sitagliptin | 56 weeks | Ozempic 1 mg | −12.1 lb (−5.5 kg) | −6.2% |
| Vs exenatide ER | 56 weeks | Ozempic 1 mg | −10.6 lb (−4.8 kg) | −5.0% |
| Vs insulin glargine | 30 weeks | Insulin glargine | +2.0 lb (+0.9 kg) | +1.0% |
| Vs insulin glargine | 30 weeks | Ozempic 1 mg | −10.4 lb (−4.7 kg) | −5.0% |
| Added to basal insulin, vs placebo | 30 weeks | Ozempic 1 mg | −13.2 lb (−6 kg) | −6.5% |
| 1 mg vs 2 mg | 40 weeks | Ozempic 1 mg | −12.3 lb (−5.6 kg) | −5.7% |
| 1 mg vs 2 mg | 40 weeks | Ozempic 2 mg | −14.1 lb (−6.4 kg) | −6.4% |
Ozempic prescribing information, section 14.1 [1]. Pounds converted from the label's kilograms; share of body weight is our arithmetic from each group's average starting weight. The 0.5 mg arms of the sitagliptin, glargine and insulin trials lost less than the 1 mg arms shown.
Two patterns run through the table. The 1 mg dose lost more than 0.5 mg in every trial that tested both. And the comparison drugs mattered: people on insulin glargine gained weight, while people on Ozempic lost it. How those doses are used is covered in how Ozempic is taken.
The 2 mg dose added little extra weight loss
In the 40-week trial that compared Ozempic's top two doses, people lost 14.1 lb (6.4 kg) on 2 mg and 12.3 lb (5.6 kg) on 1 mg. The label says that difference “was not statistically significant” [1]. The 2 mg dose did lower A1c a bit more, which is the reason the label gives for using it: blood sugar control.
So moving from 1 mg to 2 mg isn't a weight-loss step on this label. Ozempic's doses are chosen “based on glycemic control,” in the label's words, and 2 mg is its maximum [1].
How fast: the trials measured weight at 30 weeks and later
Ozempic's label reports weight at the end of each trial, at 30, 40 or 56 weeks, and doesn't publish a month-by-month average [1]. Treatment starts at a low dose meant to ease stomach side effects, so the first weeks are the slowest. If you've just started and the scale hasn't moved much, that's in line with how the drug is designed to begin.
For a clearer timeline, Wegovy's trials are the better source, because weight was their main measure. Its early months and its week-68 results are laid out in how long Wegovy takes to work.
Why Wegovy's numbers are bigger
Wegovy is the same semaglutide, approved for long-term weight reduction [2]. In STEP 1, adults without diabetes on Wegovy 2.4 mg lost 14.9% of their body weight on average at week 68, against 2.4% on placebo; that was 33.7 lb (15.3 kg) on average [3]. That's more than twice the share Ozempic's trials reported.
| Product and trial | Who was in it | Length | Average weight change |
|---|---|---|---|
| Ozempic 1 mg (label trials) | Type 2 diabetes | 30 to 56 weeks | About −5% to −6.5% |
| Ozempic 2 mg (label trial) | Type 2 diabetes | 40 weeks | −6.4% |
| Wegovy 2.4 mg (label Study 3) | Type 2 diabetes | 68 weeks | −9.6% (placebo −3.4%) |
| Wegovy 7.2 mg (label Study 9) | Type 2 diabetes | 72 weeks | −13.2% (placebo −3.8%) |
| Wegovy 2.4 mg (STEP 1, label Study 2) | No diabetes | 68 weeks | −14.9% (placebo −2.4%) |
Ozempic figures are our arithmetic from the label's kilogram results [1]; Wegovy figures are as printed in its label, Tables 8 and 12 [2].
- Higher doses: Wegovy's weight doses are 2.4 mg and, for some adults, 7.2 mg a week. Ozempic stops at 2 mg [2].
- Diabetes: people with type 2 diabetes lose less on semaglutide. Even on Wegovy 2.4 mg, the diabetes trial averaged 9.6%, against 14.9% in people without diabetes.
- Longer trials: Wegovy's results were measured at 68 to 72 weeks; most Ozempic trials stopped at 30 to 56.
- Different goals: Ozempic's trials aimed at A1c. Wegovy's trials paired the drug with diet and activity coaching aimed at weight.
The brands are compared side by side in Ozempic vs Wegovy, and the drug behind both is explained on our semaglutide page.
Can you take Ozempic for weight loss?
Only off label. FDA says prescribers may generally use an approved drug for an unapproved use “when they judge that it is medically appropriate for their patient” [5]. But the label's weight data come only from people with diabetes, and your plan decides whether it covers an off-label use. For weight, the semaglutide with weight data and a weight label is Wegovy.
How people get Ozempic, and what it costs without coverage, is in how to get Ozempic and Ozempic cost without insurance. For Medicare, see does Medicare cover Ozempic.
What comes with the weight loss
Stomach side effects are the most common trade-off. In the label's placebo-controlled trials, nausea affected 20.3% of people on 1 mg and 6.1% on placebo, and most stomach effects happened while the dose was being raised [1]. What helps is covered in Ozempic stomach side effects, and the facial changes some people notice with faster loss are in Ozempic face.
The loss also depends on staying on the drug. In trials of weight-dose semaglutide, people who stopped regained about two-thirds of what they'd lost within a year [4]; that pattern is covered in what happens when you stop a GLP-1. Compounded semaglutide wasn't used in any of these trials; whether it performs the same is in does compounded semaglutide work.
Compare before you sign up: 21 brand Wegovy and Zepbound self-pay programs, scored on price, care and pharmacy checks.