Tirzepatide Dosing Schedule (2.5 to 15 mg)
The standard 6-step tirzepatide titration, why holding patterns matter, and when most people stop ramping. With dose table and timing.
Updated May 6, 2026 · 5 min read
Tirzepatide uses a six-step titration ladder, climbing from 2.5 mg to 15 mg in 2.5-mg increments, with four weeks at each step as the default. The schedule isn't optional — it's how the drug is approved, and skipping steps reliably produces worse side effects without faster results.
The longer truth is that most people don't need 15 mg, and many do best by holding at 5, 7.5, or 10 mg longer than the label suggests.
The full ladder
| Weeks | Weekly dose | Notes |
|---|---|---|
| 1–4 | 2.5 mg | Starting dose. Not therapeutic — meant to introduce the drug. |
| 5–8 | 5 mg | First "real" therapeutic dose for many people. |
| 9–12 | 7.5 mg | Common holding point if response is good. |
| 13–16 | 10 mg | Common long-term maintenance dose. |
| 17–20 | 12.5 mg | Optional step up if response plateaus. |
| 21+ | 15 mg | Maximum approved dose. |
Each step is a single weekly subcutaneous injection — abdomen, thigh, or upper arm. Rotate sites every week. This schedule applies identically to Mounjaro (T2D) and Zepbound (weight management). For the brand difference, see Mounjaro vs Zepbound.
Why titration matters more for tirzepatide than for some peers
Two reasons.
- The dose range is wider. Going from 2.5 to 15 mg is a 6x range, compared to semaglutide's roughly 10x range from 0.25 to 2.4 mg. Each tirzepatide step is a meaningful jump in receptor activation.
- Some people are unusually sensitive at higher doses. A subset of users tolerate 5 and 7.5 mg fine, then run into significant nausea or constipation at 10 or 12.5 mg. The ladder gives those people a chance to discover their ceiling without overshooting.
For people without strong GI side effects, the four-week default is fine. For people who get rough symptoms, holding 6–8 weeks at a step is often kinder than charging up.
The "good enough" doctrine
A common pattern that providers don't always advertise: many people hit their goal weight or A1c target before reaching 15 mg, and stop ramping. The labels permit this. The trial data supports it — SURMOUNT-1 showed 5 mg producing about 16% weight loss over 72 weeks, which beats every semaglutide dose ever tested.
| Tirzepatide dose | SURMOUNT-1 mean weight loss (72 wks) |
|---|---|
| 5 mg | 16.0% |
| 10 mg | 21.4% |
| 15 mg | 22.5% |
The marginal benefit from 5 → 10 mg is about 5 percentage points. The marginal benefit from 10 → 15 mg is about 1 percentage point. For many people, the side-effect cost of pushing higher isn't worth the small efficacy gain. See when to step up for the decision framework.
Holding patterns at 5, 7.5, and 10 mg
If you're tolerating well and the scale is moving, there's no urgency to climb. Common holds:
- Hold at 5 mg — you're new to GLP-1s, losing weight steadily, and your provider wants to keep things smooth. Reasonable for 8–16 weeks.
- Hold at 7.5 mg — some people find this their "sweet spot" of efficacy and tolerability. Fine to stay there for months.
- Hold at 10 mg — the most common long-term maintenance dose. Many people stop here permanently.
Holding is not the same as failing. Tirzepatide's effect at any given dose continues to compound for months — weight loss is non-linear and tends to slow but not stop after the first 6 months.
When to step up sooner
Generally not advised, but in specific cases (severe T2D requiring rapid A1c reduction, tight clinician supervision) some providers shorten the interval to 2–3 weeks. The label says "at least 4 weeks at each dose before increasing." Compressing aggressively trades tolerability for speed and isn't well-supported by trial data.
When to slow down
Slow down — or hold for an extra cycle — if any of these apply:
- Active nausea, vomiting, or severe reflux from the current step
- Constipation severe enough to need pharmaceutical help (see constipation playbook)
- Unintended dehydration or under-eating from appetite suppression
- A recent illness, surgery, or hospitalization
- Pregnancy planning or new pregnancy (tirzepatide must be stopped)
A 2-week or 4-week extra hold has no downside. The receptor activation is durable.
Compounded tirzepatide dosing
The milligram numbers are identical for compounded tirz, but you're drawing units from a vial rather than clicking a pre-filled pen. The math gets fiddly fast:
- A 10 mg/mL vial means 10 mg in 1 mL = 10 mg in 100 units (insulin syringes).
- 2.5 mg = 25 units. 5 mg = 50 units. 7.5 mg = 75 units. 10 mg = 100 units (a full insulin syringe).
- Vials at different concentrations exist (e.g., 5 mg/mL, 20 mg/mL). Always confirm the concentration on your specific vial, then run the math through the calculator.
Compounded tirzepatide quality and legality have shifted since the FDA shortage resolution. Our compounded tirzepatide cluster covers what to ask a compounder.
Missed doses
The label allows you to take a missed dose within 4 days of the scheduled day. Beyond that, skip and resume on your normal day. Don't double up. If you've missed multiple weeks, talk to your prescriber — you may need to drop back a step before resuming.