Zepbound (tirzepatide) is an FDA-approved medication for chronic weight management. It's a once-weekly injection that works differently from other GLP-1 medications because it acts on two hormones, not just one, which can lead to stronger appetite suppression and changes in how your body handles fat.
The dosing schedule is designed to minimize side effects by starting low and gradually increasing. Here's the complete step-by-step guide to Zepbound's titration plan.
Zepbound follows a six-step titration schedule that typically takes about 5 months to reach the maximum maintenance dose. Each step lasts a minimum of 4 weeks.
| Period | Weeks | Dose | Notes |
|---|---|---|---|
| Step 1 (Month 1) | Weeks 1-4 | 2.5 mg | Starting dose, not for maintenance |
| Step 2 (Month 2) | Weeks 5-8 | 5 mg | First increase |
| Step 3 (Month 3) | Weeks 9-12 | 7.5 mg | Optional (some patients skip to 10 mg) |
| Step 4 (Month 4) | Weeks 13-16 | 10 mg | Common maintenance dose |
| Step 5 (Month 5) | Weeks 17-20 | 12.5 mg | Optional (some patients skip) |
| Maintenance (Month 6+) | Ongoing | 15 mg | Maximum approved dose |
Each dose must be given for at least 4 weeks before moving to the next step. This gives your body time to adjust and helps your doctor see how you're responding.
The 7.5 mg and 12.5 mg steps are optional. Some patients reach their goal weight loss at 5 mg or 10 mg and stay there. Others need the full 15 mg dose. Your doctor will decide what's right for you based on your progress and any side effects you experience.
Zepbound offers more flexibility in maintenance dosing than some competitors. You can stay on 5 mg, 10 mg, or go up to the maximum 15 mg. The best maintenance dose is the one that gives you the results you want with side effects you can manage.
Zepbound is given as a subcutaneous injection, meaning it goes just under the skin. You can inject in your abdomen, thigh, or upper arm. It's important to rotate your injection sites to avoid skin damage or irritation.
Take your injection on the same day each week. You can use it with or without meals. If you're nervous about needles, the pen is small and the needle is thin, which most patients find less intimidating than they expected.
If you miss your weekly injection, take it as soon as you remember within 4 days of your scheduled day. If more than 4 days have passed, skip that dose and resume your regular schedule the following week. Do not take two doses at once.
Store unused Zepbound pens in the refrigerator at 36-46 degrees Fahrenheit. Once you start using a pen, you can keep it at room temperature (up to 77 degrees Fahrenheit) for up to 21 days. After 21 days at room temperature, discard it even if there's medication left.
Never freeze your medication. If it has been frozen, throw it away and use a new pen.
Side effects are most common when you first start or when you increase your dose. The most common side effects include nausea, vomiting, diarrhea, constipation, and stomach pain. These typically improve within a few days or weeks as your body adjusts.
You may notice appetite suppression kick in within the first week or two. Weight loss usually becomes more noticeable after a few weeks on each dose level. It's normal for progress to come in waves rather than steady loss every week.
Do not stop taking Zepbound without talking to your doctor first. Suddenly stopping can lead to rapid regain of weight. If you have side effects, talk to your doctor about whether you should stay at your current dose longer, move to the next dose as planned, or try a different approach.
Zepbound is not suitable for everyone. Tell your doctor if you have a personal or family history of medullary thyroid cancer, or if you have multiple endocrine neoplasia type 2 (MEN 2). It's also important to disclose all medications, supplements, and health conditions you have.
A pill version of tirzepatide is expected to receive FDA approval in 2026 after being granted fast-track status. If you prefer an oral option in the future, that may become available to you.
Every body is different. Some people move through the dosing schedule faster than planned. Others need more time at each dose. Work closely with your prescriber to adjust the timeline based on your individual response.
Use our free calculator to map out your Zepbound titration timeline with exact dates for each dose increase.
Open the GLP-1 Calculator