Tirzepatide dosage — 2.5mg to 15mg explained

Six dose options for personalized treatment

Quick read · 4 min

Last reviewed: April 2026Every claim linked to source

Tirzepatide starts at 2.5mg and steps up every 4 weeks through six doses, reaching the maximum of 15mg by around week 21. Many people find their long-term dose at 10mg or 12.5mg — you do not need to reach the maximum.

Your step-up schedule

You start at 2.5mg and increase every 4 weeks through up to six dose levels. You can stop at any point where you are happy with results.

  1. Weeks 1–42.5mg

    Starter dose. Too low for real weight loss — the goal is letting your body get used to the drug.

  2. Weeks 5–85mg

    First real working dose. Hunger reduction becomes noticeable for most people.

  3. Weeks 9–127.5mg

    Steady weight loss for most. Some people stay here long-term.

  4. Weeks 13–1610mg

    Common maintenance stopping point. Weight loss around 16–18% on average.

  5. Weeks 17–2012.5mg

    Only if your doctor recommends pushing higher. Most benefit is already reached.

  6. Week 21 onwards15mg

    Maximum dose. Adds only 1–2 percentage points over 12.5mg on average.

    Maximum dose

Many people stop at 10mg or 12.5mg if they are satisfied. You do not have to reach 15mg.

See the full titration schedule with week-by-week expectations →

Starting dose vs maximum dose

The maximum dose is the highest approved dose — it is not the same as your maintenance dose.

Starting dose
2.5mg
Your first dose — the lowest to let your body adjust
Maximum dose
15mg
The highest approved dose — not everyone needs to reach it

Maintenance dose is different from maximum dose. Your maintenance dose is wherever you stay long-term — this could be any dose where you have good weight loss with tolerable side effects. Many people maintain on doses lower than the maximum.

Weight loss at each dose

Average weight loss from clinical trials. Bars scale with the percentage — higher doses produce more weight loss, but returns get smaller toward the top.

2.5mg~4–5%
5mg~8–10%
7.5mg~11–13%
10mg~16–18%
12.5mg~19–20%
15mg20.9%

The jump from 2.5mg to 5mg almost doubles weight loss. The jump from 12.5mg to 15mg only adds about 1–2 percentage points.

Source: SURMOUNT-1 trial (n=2,539, 72 weeks)

What this means
Based on SURMOUNT-1 (n=2,539, 72 weeks): weight loss was about 4–5% at 2.5mg, 8–10% at 5mg, 11–13% at 7.5mg, 16–18% at 10mg, 19–20% at 12.5mg, and 20.9% at 15mg. The jump from 2.5mg to 5mg is significant; the jump from 12.5mg to 15mg is only about 1–2% additional weight loss.

When your doctor might change your dose

Your dosing is flexible and tailored to your needs.

Tolerating well

Increase to the next dose every 4 weeks as planned.

Side effects significant

Stay at current dose for 6–8 weeks before increasing, or pause increases.

Reached your goal

If you hit your weight loss target at 10mg, you can stay there — no need to reach 15mg.

Keep reading

Full Tirzepatide overview →How to take it →Titration schedule →Side effects →

Next step most people take

Learn how to take it
Injection technique or daily pill routine
See the titration schedule
Week-by-week expectations and timeline

Backed by evidence · Every claim linked to its source

Last reviewed: April 2026

Medical disclaimer: This website is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any treatment.