Zepbound Dosing Schedule (2026 Guide)
Week-by-week titration from 2.5 mg starter to 15 mg maintenance, with what to expect at each step. Verified against the current Lilly label.
Zepbound starts at 2.5 mg once weekly for the first 4 weeks (a starter dose, not a treatment dose). The dose is then increased every 4 weeks in 2.5 mg steps until you reach a maintenance dose of 5, 10, or 15 mg once weekly. Most patients land at 10 mg or 15 mg for maintenance. The full titration to the 15 mg ceiling takes about 5 months.
Zepbound titration schedule, week by week
Six strengths total. Three of them (5 mg, 10 mg, 15 mg) are FDA-approved as maintenance doses. The others are titration steps to get there.
| When | Dose | Purpose | What to expect |
|---|---|---|---|
| Weeks 1-4 | 2.5 mg | Starter dose | Body adjusts to the medication. Mild to moderate nausea is most common in week 1, usually settling by week 3. This dose is not intended for ongoing weight management on its own. |
| Weeks 5-8 | 5 mg | First maintenance optionMaintenance | Appetite suppression becomes meaningful. Some patients stop here as their long-term dose. Side effects often peak briefly after the dose increase, then settle. |
| Weeks 9-12 | 7.5 mg | Intermediate titration step | Used as a stepping stone to a higher maintenance dose, not typically a long-term dose. Some clinicians hold here longer if side effects are pronounced. |
| Weeks 13-16 | 10 mg | Second maintenance optionMaintenance | A common long-term landing point. SURMOUNT-1 showed about 19% mean body weight reduction at 72 weeks at this dose. |
| Weeks 17-20 | 12.5 mg | Intermediate titration step | Stepping stone to the maximum dose. Some clinicians stop here if side effects at higher doses become unmanageable. |
| Week 21+ | 15 mg | Maximum maintenance doseMaintenance | FDA-approved ceiling. SURMOUNT-1 showed about 21% mean body weight reduction at 72 weeks. Side effect rates are higher than at 5 mg or 10 mg. |
Most patients land at 10 mg or 15 mg long-term. Some hold at 5 mg if it gives them the appetite suppression and weight loss they need. There is no medical requirement to escalate to the maximum if you are achieving your goal at a lower dose.
Mean weight loss by maintenance dose
From the pivotal SURMOUNT-1 trial, 72-week mean body-weight reduction by maintenance dose:
SURMOUNT-1, 72 weeks, adults with obesity
SURMOUNT-1, 72 weeks, adults with obesity
SURMOUNT-1, 72 weeks, adults with obesity
Individual results vary widely. The trial population was adults with obesity (BMI ≥30) or overweight (BMI ≥27) with at least one weight-related condition. Real-world results in clinical practice tend to track these averages reasonably closely when patients adhere to the dose for the full 72 weeks.
How to inject Zepbound
- Abdomen (at least 2 inches from the navel)
- Front of thigh
- Back of upper arm
Rotate the injection site each week. You can use the same general area but shift the exact spot.
Once weekly, any day of the week
Take with or without food, with or without other medications. Time of day does not matter clinically.
If you miss a dose
Take the missed dose as soon as you remember.
Skip the missed dose. Take your next dose on your regularly scheduled day.
If you remember within 3 days of your next scheduled dose, skip the missed dose. Do not double up.
Never take two doses to make up for a missed one. Doubling the dose can cause severe nausea and vomiting and does not improve weight loss outcomes.
When prescribers adjust the schedule
If side effects at a new dose are pronounced, your prescriber may keep you on the previous dose for an additional 4 weeks before stepping up.
If 5 mg or 10 mg gives you the appetite suppression and weight loss you want, there is no clinical requirement to escalate further. Many patients land at 5 or 10 mg long-term.
If side effects at a higher dose become unmanageable, your prescriber may step you back down. This is sometimes called maintenance microdosing when used long-term after weight goal is reached. See our GLP-1 microdosing guide for the maintenance-microdose context.
Common side effects, with frequency
From the prescribing information at maintenance doses (5 mg and above). Side effects tend to peak briefly after each dose increase, then settle.
| Side effect | Frequency | Practical notes |
|---|---|---|
| Nausea | Up to 31% | Most common in the first 4 weeks of each dose increase. Eating smaller meals and avoiding fatty or spicy foods helps. |
| Diarrhea | Up to 23% | Often occurs in the first weeks. Hydration is important. |
| Vomiting | Up to 13% | More common at higher doses (10 to 15 mg). Worth raising with your clinician if persistent. |
| Constipation | Up to 17% | Adequate fiber and fluid intake helps. |
| Decreased appetite | Common | This is often the desired effect, but ensure you still eat enough nutrient-dense food daily. |
| Abdominal pain | Up to 10% | Persistent or severe abdominal pain warrants immediate clinical attention. |
| Injection-site reactions | Common | Mild redness or itching at the site. Usually resolves on its own. Rotate injection sites. |
Storage
- Refrigeration: Refrigerate at 36 to 46 degrees Fahrenheit (2 to 8 degrees Celsius) in the original carton, protected from light.
- Room temperature: Can be stored at room temperature up to 86 degrees Fahrenheit (30 degrees Celsius) for up to 21 days, one time. Do not put back in the refrigerator after that.
- Do not freeze: Do not freeze. Discard if frozen.
- Handling: Do not shake the pen vigorously.
Frequently asked questions
Need a clinician who actually walks you through the schedule?
Take our 90-second quiz to get matched with a Zepbound provider whose dosing approach fits how you want to be cared for.
Dosing schedule, available strengths, missed-dose guidance, storage, and administration come directly from the Zepbound (tirzepatide) Prescribing Information from Eli Lilly. Trial outcomes are from the SURMOUNT-1 study published in NEJM (2022). Side effect frequencies reflect the rates reported in the prescribing information at the indicated maintenance doses.