Zepbound (tirzepatide) starts at 2.5 mg injected once a week for 4 weeks. After that the dose goes up to 5 mg and can be raised in 2.5 mg steps, each held for at least 4 weeks, until you reach a maintenance dose of 5, 10 or 15 mg. The maximum is 15 mg a week. The 2.5 mg dose is for starting treatment and is not a maintenance dose. Your prescriber chooses your pace and your final dose (Zepbound prescribing information, section 2).
This guide walks through the Zepbound dosage schedule from the FDA-approved label, how to handle a missed dose, and what to track. It is general information, not medical advice: talk to your prescriber before changing a dose.
The Zepbound titration schedule
The label’s escalation is built to reduce gastrointestinal side effects. It applies to every approved use:
| Step | Weekly dose | How long | Notes |
|---|---|---|---|
| 1 | 2.5 mg | 4 weeks | Starting dose; not approved as a maintenance dose |
| 2 | 5 mg | At least 4 weeks | First possible maintenance dose (weight reduction only) |
| 3 | 7.5 mg | At least 4 weeks, if increased | Increase in 2.5 mg steps |
| 4 | 10 mg | At least 4 weeks, if increased | Maintenance dose for weight reduction or sleep apnea |
| 5 | 12.5 mg | At least 4 weeks, if increased | Step toward the maximum |
| 6 | 15 mg | Ongoing | Maximum recommended dose |
Maintenance for weight reduction and long-term maintenance is 5, 10 or 15 mg once weekly. For obstructive sleep apnea in adults with obesity it is 10 mg or 15 mg. The label says to consider response and tolerability when choosing the maintenance dose, and to consider a lower maintenance dose if you do not tolerate one. Source: Zepbound prescribing information, sections 2.1 and 2.2.
You do not necessarily climb the whole ladder: 5 mg and 10 mg are labeled maintenance doses too, and that decision is for you and your prescriber. For the full picture of the drug, see Zepbound: how this injectable works, and for the same kind of schedule on semaglutide, see how long Ozempic takes to work.
How and when to inject
Per the label (section 2.4):
- Inject once weekly, at any time of day, with or without meals.
- Inject under the skin of the abdomen or thigh. Another person can inject into the back of the upper arm.
- Rotate injection sites with each dose.
- Zepbound comes as single-dose pens, single-dose vials, multi-dose vials and a single-patient-use KwikPen. Your prescriber or pharmacist should train you on the specific form you receive. Never share a KwikPen between people, even with a new needle.
- Zepbound is used with a reduced-calorie diet and increased physical activity.
You can change your injection day if needed, as long as at least 3 days (72 hours) pass between two doses (label, section 2.3).
What if you miss a dose?
If a dose is missed, the label says to take it as soon as possible within 4 days (96 hours) after the missed dose. If more than 4 days have passed, skip it and take the next dose on your regular day. Either way, you then go back to your normal weekly schedule (label, section 2.3). Do not take two doses to catch up. If you miss several weeks, ask your prescriber how to restart; the label does not give a restart schedule.
Changing the dose
The label leaves the choice of maintenance dose to the prescriber based on treatment response and tolerability. In practice, that means a few options your prescriber may discuss with you:
- Staying on the current dose for longer before stepping up.
- Moving up to the next 2.5 mg step after at least 4 weeks, if you tolerate the current dose.
- Choosing a lower maintenance dose if you do not tolerate a higher one.
Do not change doses on your own, and do not move faster than the label’s steps.
Side effects around dose changes
In the two main weight reduction trials, gastrointestinal reactions occurred in 56% of people taking Zepbound versus 30% on placebo, and most nausea, vomiting and diarrhea occurred during dose escalation and decreased over time. Common reactions by dose were:
| Reaction | Placebo | 5 mg | 10 mg | 15 mg |
|---|---|---|---|---|
| Nausea | 8% | 25% | 29% | 28% |
| Diarrhea | 8% | 19% | 21% | 23% |
| Vomiting | 2% | 8% | 11% | 13% |
| Constipation | 5% | 17% | 14% | 11% |
Source: Zepbound prescribing information, section 6.1, Table 1. The label also warns about severe gastrointestinal reactions, dehydration that can harm the kidneys, gallbladder disease and pancreatitis. Contact your prescriber if you have persistent severe abdominal pain, repeated vomiting, or signs of dehydration. See GLP-1 side effects: what to expect and how to manage them for everyday coping tips.
The label also says that females using oral contraceptives should switch to a non-oral method, or add a barrier method for 4 weeks after starting and for 4 weeks after each dose increase. This is a good reason to tell your prescriber about every medicine you take.
Habits that make the schedule easier
These are practical ideas, not label requirements:
- Pick a weekly injection day and set a recurring reminder.
- Keep a short note of your dose, date and injection site every time.
- Eat smaller meals if you feel full quickly, and keep up fluids.
- Write down side effects and when they began relative to the dose, so you can discuss them at your next appointment.
Mingo is a GLP-1 tracker for iPhone and Android that logs shots and doses, food and protein, side effects and weight in one place. It does not replace your doctor. Get the app. To compare Zepbound with the other leading weekly drug, see Zepbound vs Wegovy.
Key takeaways
- Zepbound starts at 2.5 mg weekly for 4 weeks, then 5 mg, with 2.5 mg steps every at least 4 weeks.
- Maintenance is 5, 10 or 15 mg weekly (10 or 15 mg for sleep apnea); 15 mg is the maximum.
- Missed dose: take it within 4 days (96 hours), otherwise skip it. Never double up.
- Gastrointestinal effects are most common during dose escalation; report severe or lasting symptoms.
- Your prescriber decides your dose. Keep a log to bring to appointments.
Frequently asked questions
What is the recommended Zepbound dosage schedule?
The label starts you at 2.5 mg once weekly for 4 weeks, then 5 mg. After that, the dose may be increased in 2.5 mg steps after at least 4 weeks on the current dose. Maintenance doses are 5, 10 or 15 mg, and 15 mg is the maximum. Your prescriber decides how far you go.
How do I adjust my Zepbound dose?
Only with your prescriber. They consider how well the drug is working and how well you tolerate it. If you do not tolerate a maintenance dose, the label says a lower maintenance dose can be considered.
What should I do if I miss a dose?
Take it as soon as possible if it has been 4 days (96 hours) or less since the missed dose. If more than 4 days have passed, skip it and take your next dose on the regular day. Do not take extra medicine to catch up.
How can I track my weekly dosage?
Use whatever you will actually keep up: a calendar reminder, a notebook, or an app such as Mingo that records your dose, injection day, side effects and weight. Bring the record to your appointments.
Are there side effects from changing doses?
Gastrointestinal side effects such as nausea, vomiting and diarrhea are most common during dose escalation and usually decrease over time, according to the label. Contact your prescriber if they are severe or lasting.
