weighweekly / Expected loss by weight
How Much Weight Will I Lose on Ozempic at 375 lbs?
Short answer: at 375 lbs, the STEP 2 / SUSTAIN average works out to about 13 lbs by month 3 (362 lbs), 20 lbs by month 6 (355 lbs), and 26 lbs by week 68 (349 lbs, or 7.0% of your starting weight) on semaglutide.
Ozempic at 375 lbs, week by week
| Point | % lost | Lbs lost | Weight |
|---|---|---|---|
| Week 4 (~mo 1) | 1.2% | 4.5 lbs | 370.5 lbs |
| Week 12 (~mo 3) | 3.4% | 12.8 lbs | 362.3 lbs |
| Week 26 (~mo 6) | 5.4% | 20.1 lbs | 354.9 lbs |
| Week 39 (~mo 9) | 6.3% | 23.7 lbs | 351.3 lbs |
| Week 52 (~mo 12) | 6.8% | 25.5 lbs | 349.5 lbs |
| Week 68 (~mo 16) | 7.0% | 26.3 lbs | 348.8 lbs |
Applied to a 375 lb starting weight from the mean curve in STEP 2 / SUSTAIN (adults with type 2 diabetes).
Why month 1 looks broken
At 375 lbs the first four weeks average only 4.5 lbs — about 1.2% of your weight. That is not the drug failing. The starter dose is a tolerance ramp, and the steep part of the curve does not arrive until you are on a full treatment dose. Here is the schedule the trial used:
- 0.25 mg (weeks 1-4, starter dose)
- 0.5 mg (weeks 5-8)
- 1.0 mg (week 9 onward)
Ozempic is approved for type 2 diabetes, not for weight loss. Its weight data comes from diabetes trials, where loss is consistently smaller than in the non-diabetic trials used for Wegovy and Zepbound. If weight is the goal, the 2.4 mg version (Wegovy) is the labelled option.
Same starting weight, other drugs
| Drug | Week 52 weight | Total lost |
|---|---|---|
| Ozempic (this page) | 349.5 lbs | 25.5 lbs (6.8%) |
| Zepbound at 375 lbs | 301.9 lbs | 73.1 lbs (19.5%) |
| Wegovy at 375 lbs | 320.6 lbs | 54.4 lbs (14.5%) |
Other starting weights on Ozempic
300 lbs 325 lbs 350 lbs 400 lbs see all
Questions people actually ask
How much weight will I lose in the first month on Ozempic at 375 lbs?
About 4.5 lbs, taking 375 lbs to roughly 371 lbs. Month 1 is the flattest stretch of the whole curve because you are still on the starter dose, which exists to let your gut adjust, not to drive loss. Anything from almost nothing up to about 8 lbs sits inside the normal spread for month 1.
Is 26 lbs guaranteed?
No. These are trial averages. In STEP 2 / SUSTAIN the spread was wide: a large minority lost far more than average, and a real share of people lost under 5% of their weight. Dose, how long you stay on it, and whether you hit a protein target all move your own number.
What is the fastest part of the curve?
Roughly weeks 12 to 36, once you are on a full treatment dose. In this scenario the average runs near 0.28% of body weight per week through the early titration and then steepens before flattening out toward week 68.
What to do with this number
- Compare a stall against the trial curve — most "plateaus" are the curve flattening on schedule.
- Protein target — 0.6-0.8 g per lb of goal weight is what protects muscle while you lose.
- Weekly tracker — weigh on the same day, same conditions, and read the trend not the day.
- What it costs and where to get it.
Where should you be this week?
One short email a week with the number your curve says to expect. Free.
Educational only, not medical advice. Numbers are published trial averages, not a prediction for any individual. Dosing decisions belong with your prescriber.