Tirzepatide 15 mg: what it costs
Step 6 of the tirzepatide ladder, around weeks 21+. 6 providers charge the same here as at the starting dose — the rest may not.
Updated 2026-09-18
15 mg is a price checkpoint as much as a clinical one. Here is what the board charges at this rung.
15 mg is step 6 of 6 on the tirzepatide ladder, reached around weeks 21+. The maximum approved dose, and the one that produced the largest average result in trials.
It is also the point where pricing starts to matter. On a programme that charges by dose, your bill climbs exactly as the treatment begins working. On a flat-rate programme, 15 mg costs what the starting dose cost — and over a full titration that difference is worth more than almost any advertised discount.
What the board does at this dose
Roughly half our listings hold one price from the starting dose to the maximum. The rest re-price as you climb, which means the figure that got you in the door is not the figure you pay by the time the medication is working. That is the gap this page exists to show.
What 15 mg is for
15 mg produced the largest average result in SURMOUNT-1 — 20.9% over 72 weeks — and it is the top of the ladder. What gets lost in that figure is that it is an average of people who tolerated the maximum dose for eighteen months, which is not everybody. Reaching 15 mg is not a goal in itself, and stepping back down once you have reached your target is a normal thing to do rather than a retreat.
The evidence. In SURMOUNT-1, the 15 mg group lost an average of 20.9% of body weight over 72 weeks.
Not everybody needs to get here, and reaching it is not a measure of success. Many people do best settling lower.
Where 15 mg sits on the ladder
| Step | Dose | Roughly when |
|---|---|---|
| 1 | 2.5 mg | weeks 1-4 |
| 2 | 5 mg | weeks 5-8 |
| 3 | 7.5 mg | weeks 9-12 |
| 4 | 10 mg | weeks 13-16 |
| 5 | 12.5 mg | weeks 17-20 |
| 6 | 15 mg ← this page | weeks 21+ |
Do you need to go higher than 15 mg?
15 mg is the top of the ladder, so the question here is the opposite one: whether you need to stay this high. Some people step back down to a lower maintenance dose once they have reached their goal. That is a conversation for your prescriber.
Do I need to reach 15 mg to get results? No. 10 mg produced 19.5% average loss against 20.9% at 15 mg — a real but modest difference. Plenty of people do best settling lower and staying there, which beats reaching the maximum and stopping.
The board caveat: compounded is not FDA-approved, approved pills start at $149, and Medicare hits $50 on 1 July 2026. Any listing that ignores those three facts is selling, not reporting.
More from the desk
- The cheapest tirzepatide online
Every provider whose monthly price actually includes the medication, sorted on what you are billed in month two.
- Tirzepatide 2.5 mg: what it costs
Step 1 of the tirzepatide ladder, around weeks 1-4. 6 providers charge the same here as at the starting dose — the rest may not.
- Medicare, GLP-1s and the $50 month
CMS is running a time-limited programme giving eligible Part D members certain GLP-1s for $50 a month. If you are on Medicare, read this before paying cash for anything.
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