Zepbound Plateau: When It Hits, Why, and How to Break It
Results vary a lot by dose and by person. In SURMOUNT-1, the average loss ran from 15% on tirzepatide 5 mg weekly to 20.9% on tirzepatide 15 mg weekly, against 3.1% on placebo.
- Average loss, top dose
- 20.9%
- On placebo
- 3.1%
- Trial length
- 72 weeks
- Trial
- SURMOUNT-1
Zepbound in brief
Half-life: 5 to 6 days. After 5.5 days, half of it is gone, and about 3% remains after five half-lives (27.5 days).
In SURMOUNT-1 over 72 weeks, body weight fell 20.9%, compared with 3.1% on placebo.
Monthly price points are shown in US dollars for list prices and self-pay offers. Each figure was read from the maker's price page.
Sources: FDA label (DailyMed), Eli Lilly 1 2, cnbc.com.
Zepbound plateau: the numbers first
| Trial | Dose group | Average weight lost | Placebo or comparison | Weeks | Who was in it |
|---|---|---|---|---|---|
| SURMOUNT-1 | Tirzepatide 5 mg weekly | 15% | 3.1% | 72 | Adults with obesity or overweight, without diabetes |
| SURMOUNT-1 | Tirzepatide 10 mg weekly | 19.5% | 3.1% | 72 | Adults with obesity or overweight, without diabetes |
| SURMOUNT-1 | Tirzepatide 15 mg weekly | 20.9% | 3.1% | 72 | Adults with obesity or overweight, without diabetes |
| SURMOUNT-2 | Tirzepatide 10 mg weekly | 12.8% | 3.2% | 72 | Adults with type 2 diabetes who also had obesity or overweight |
| SURMOUNT-2 | Tirzepatide 15 mg weekly | 14.7% | 3.2% | 72 | Adults with type 2 diabetes who also had obesity or overweight |
| SURMOUNT-5 | Tirzepatide 10 or 15 mg weekly (Zepbound) | 20.2% | semaglutide (Wegovy) | 72 | Adults with obesity, without type 2 diabetes |
Sources: SURMOUNT-1 (FDA label (DailyMed)), SURMOUNT-2 (PubMed), and SURMOUNT-5 (PubMed).
What causes a stall and what helps
- See which dose step you have reached. Each trial above produced less weight loss at the lower doses.
- Look back over the past month and count how many doses you missed or took late.
- Keep a record of your food and drinks for a few days. When portions get smaller, liquid calories and grazing add up.
- Get protein at every meal and continue your strength exercise, so the weight you lose is mostly fat.
- Check on your sleep and stress, because both change appetite.
- Ask your pharmacist if any other medicines you take might cause weight gain.
- Talk to your prescriber about checks of your thyroid or blood sugar. If progress has stalled for months, discuss switching medicines too.