You lose weight on semaglutide. Then the prescription ends, the cost climbs, or the side effects wear you down. So what happens next? Three trials tested it directly, by stopping the drug on purpose and measuring what followed.
The short answer is that most of the weight comes back within a year. The longer answer depends on how you stop, and it is below. The drug itself is covered in the semaglutide guide, and the wider picture sits under the weight goal.
What happened when everything stopped
STEP 1 gave 1,961 adults weekly semaglutide 2.4 mg or placebo for 68 weeks, alongside a lifestyle program [1]. At week 68, both the drug and the lifestyle program ended. A subset of 327 people was then followed for another year.
By week 68, this group had lost 17.3% of their weight on semaglutide, against 2.0% on placebo. A year after stopping, the semaglutide group had regained 11.6 percentage points [1].
That left a net loss of 5.6% from where they started. The placebo group ended at 0.1%. The authors put it plainly: people regained about two-thirds of what they had lost.
The health markers followed the scale. Most improvements in blood pressure, blood sugar and cholesterol drifted back toward baseline by week 120 [1].
What happened when only the drug stopped
STEP 4 asked a cleaner question. Everyone took semaglutide for 20 weeks first and lost 10.6% on average [2]. Then 803 people were randomized. Two in three stayed on the drug. One in three was switched to placebo, without being told.
Both groups kept the lifestyle program. Over the next 48 weeks, people who stayed on semaglutide lost another 7.9%. People switched to placebo gained 6.9% [2].
The gap between them was 14.8 percentage points (95% CI, 13.5 to 16.0). Waist size and blood pressure also favored staying on it. The Wegovy label lists this as its placebo withdrawal trial [5].
There is a trade-off in the same trial. Stomach and bowel side effects were reported by 49.1% of those who stayed on semaglutide, against 26.1% on placebo. [2]
Is it the same with tirzepatide?
Yes, in the one trial that tested it. SURMOUNT-4 gave 783 adults tirzepatide for 36 weeks, and they lost 20.9% on average. [3]
Then 670 were randomized to keep going or switch to placebo for a year. Those who kept going lost another 5.5%. Those switched to placebo gained 14.0% [3].
By the end, 89.5% of those still on tirzepatide had kept at least 80% of their earlier loss. On placebo, 16.6% had. How the two drugs compare while you take them is in tirzepatide vs semaglutide, and the dose steps the tirzepatide trials used are in tirzepatide dosage.
How fast does the weight come back?
A 2026 review in the BMJ pooled 37 studies with 9,341 participants who stopped a weight-loss medicine [4]. Regain averaged 0.4 kg a month (95% CI, 0.3 to 0.5).
That was faster than after diet and exercise programs ended, by about 0.3 kg a month. The difference held regardless of how much weight people had first lost [4].
The review projected that heart and metabolic markers would return to baseline within 1.4 years of stopping. The authors suggest caution about short-term use without a wider plan.
What to ask before you start
The STEP 1 authors read their results as confirming that obesity is a chronic condition [1]. The drug works while you take it. On average, stopping undid much of the effect.
That makes the maintenance plan worth discussing on day one. Ask your prescriber what happens if cost or supply changes. Ask how side effects would be handled before they push you to quit. The daily tablet form is covered in what the Wegovy pill trials showed.
If you are comparing telehealth sellers, the Care Bare Rx review sets out what one seller publishes about its semaglutide program.