vaccinesDosage Guide

The tirzepatide dosing schedule, step by step

Tirzepatide climbs from 2.5 mg to a maximum of 15 mg in six steps, four weeks apart. Each step has a job.

Tirzepatide is a dual GIP and GLP-1 receptor agonist, and the dosing schedule reflects that. Because it hits two receptor systems, side effects can be stronger if titration is rushed — but the upside, in the SURMOUNT trials, was the highest average weight loss of any approved medication to date.

The Zepbound label defines a six-step titration: 2.5, 5, 7.5, 10, 12.5, and 15 mg, with at least four weeks at each step. Mounjaro (the type 2 diabetes formulation) uses the same molecule and the same step pattern but stops at 15 mg for both indications.

Three of these doses — 5, 10, and 15 mg — are recognized maintenance doses. Most people end up on one of them long-term.

The full titration path

Tirzepatide titration steps

Weeks 1–4: 2.5 mg once weekly

The starter dose. Not approved as a maintenance dose — its only job is to introduce the molecule gently. Appetite shifts are usually mild here.

Weeks 5–8: 5 mg once weekly

First maintenance-eligible dose. Many people can stop climbing here if results are strong and side effects are tolerable. Hunger noticeably decreases.

Weeks 9–12: 7.5 mg once weekly

A bridge dose. Used when 5 mg is not enough but a jump to 10 mg would be too aggressive. Not a recognized maintenance dose long-term.

Weeks 13–16: 10 mg once weekly

A common landing dose. Stronger appetite suppression than 5 mg; weight loss tends to accelerate. This is a recognized maintenance dose.

Weeks 17–20: 12.5 mg once weekly

A bridge step on the way to 15 mg. Most providers will only continue past 10 mg if weight loss has stalled and side effects are manageable.

Week 21 onward: 15 mg once weekly (max)

The maximum dose. In SURMOUNT-1, the average 72-week weight loss at 15 mg was 20.9% of body weight, the highest in the trial.

The full climb to 15 mg takes at least 20 weeks — about five months. That is by design. Going faster is associated with substantially higher dropout from side effects.

How providers choose your ceiling

Unlike semaglutide, tirzepatide has three legitimate maintenance doses (5, 10, 15 mg) rather than one. Providers typically follow this logic:

Stop at 5 mg if weight loss is steady (around 1–1.5% of body weight per month) and side effects are mild.
Move to 10 mg if weight loss stalls below the goal range or has plateaued for 4+ weeks.
Push to 15 mg when 10 mg is no longer producing progress and the patient tolerates the medication well.

A useful frame: the lowest dose that maintains your trajectory is the right dose. There is no benefit to climbing higher than you need.

Why four weeks at every step

Tirzepatide's half-life is roughly five days, slightly shorter than semaglutide's. Steady-state blood levels after a dose change take about four weeks to reach. Holding each step for four weeks lets your gut adapt to actual steady-state concentration — not to a still-rising peak. People who try to titrate weekly almost always end up nauseous and frustrated.

Four weeks is the minimum, not the maximum. It is common to spend six or eight weeks on a step if side effects are still settling.

What to expect at each step

schedule

What the dose feels like

A rough sense of how each dose changes day-to-day life.

2.5 mg

Gentle introduction

Mild fullness sooner during meals. Some nausea in the first 24–48 hours after each injection. Weight loss is real but modest.

5 mg

Appetite clearly down

Cravings drop noticeably. Many people report feeling 'satisfied' after about half their previous portion. This is a real maintenance dose for many.

10 mg

Strong steady effect

Hunger between meals largely fades. Side effects often plateau here — they do not necessarily worsen at higher doses. Weight loss accelerates for most.

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15 mg

Maximum effect

Average ~21% body weight loss over 72 weeks in trials. Some people barely think about food at this dose. Side effects are not always worse than at 10 mg.

Practical reminders during titration

Make titration easier

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Same day, same time

Pick a weekly day and stick with it. Consistency makes blood levels predictable, which makes side effects predictable.

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Light meals around injection day

Smaller, lower-fat meals on dose day and the next day blunt nausea for most people. Save bigger meals for later in the week.

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Hydrate aggressively

Aim for 2 liters daily during titration. Dehydration intensifies nausea, fatigue, and headache — all of which are common in early weeks.

Common questions

Common Concerns

Can I stay on 2.5 mg long-term?expand_more

Not per the label. 2.5 mg is defined as a starter dose only because subtherapeutic exposure tends to lose effect over time. If side effects are blocking your climb, ask your provider about extending the 2.5 mg step before moving up.

Do I have to go all the way to 15 mg?expand_more

No. The lowest dose that keeps weight coming off is the right dose. Many people stay on 5 mg or 10 mg long-term and never need 15 mg.

Is the Mounjaro dosing schedule different?expand_more

The dose steps are identical (2.5 → 5 → 7.5 → 10 → 12.5 → 15 mg). The main differences are the indication (type 2 diabetes vs. weight loss), how insurance covers it, and the maintenance dose your provider targets.

What if I miss a dose during titration?expand_more

If less than 4 days late, take it as soon as you remember. If 4 or more days late, skip it and resume on your regular day. See our missed tirzepatide dose guide for the detail.

Can I split or reduce a dose if it is too strong?expand_more

Do not modify pen doses on your own — each pen delivers a fixed amount. If a dose feels intolerable, contact your provider; they can prescribe a lower-dose pen rather than asking you to split.

Keep exploring

Browse all GLP-1 guides or learn about side effects.