Short answer: With GLP-1 weight-loss injections, the dose is increased (titrated) step by step under a doctor's supervision, usually in 4-week periods, to help the body build tolerance to the medication and to minimize digestive side effects.

Key takeaways

  • The starting dose is not a therapeutic dose; it is a low dose meant to build tolerance (for example, tirzepatide 2.5 mg, semaglutide 0.25 mg).
  • In the standard schedules of the product information, the steps differ by product: tirzepatide (Mounjaro, Zepbound) uses intervals of at least 4 weeks, Wegovy 4-week intervals. The full tables are in the Mounjaro dosage chart and Wegovy dosage.
  • Your doctor decides whether and when to step up.
  • Nausea and other digestive side effects can return for a few days after a dose increase.

GLP-1 treatments start at the lowest dose, and the dose is increased gradually under a doctor's supervision. This gradual increase is called titration. Its purpose is not to speed up the effect but to reduce side effects: it gives the body time to adjust to each step.

This page is for general information only and does not replace medical advice. When and by how much the dose goes up, and whether it goes up at all, is a decision for the prescriber alone.

Why start at the lowest dose?

These medications slow stomach emptying and prolong the feeling of fullness. Because the effect comes directly through the digestive system, starting at a high dose markedly increases nausea, vomiting and diarrhea. Starting low lets you reach the same point with less discomfort.

The starting dose is usually not a therapeutic dose; its only purpose is to get the body used to the medication.

What to expect after each increase

Side effects stand out at the start of treatment and again after each dose increase. So nausea that faded in the first weeks coming back at a new step is expected; it does not mean treatment is going badly.

This fluctuation usually lasts a few days and eases as the body adjusts to the new dose. If it persists or is severe, tell your doctor; whether the dose plan needs to change is for the doctor to assess.

When is the dose increased?

The dosing decision is your doctor's. The steps in the product information are a standard schedule, not a personal treatment plan. Which step to stay on, when to move and whether to step up at all is decided by the prescriber.

The time between steps and the amount vary by product and are written in the package leaflet. The standard schedules from the prescribing information are set out as tables in the Mounjaro dosage chart and Wegovy dosage. What the schedules share is that the next step does not come before the set time on the current one has passed. The prescriber may slow the schedule down depending on the response.

When a step is not well tolerated, the prescriber may decide to stay on it longer or go back one step.

What to watch for during a dose increase

  • Making portions smaller and eating slowly can make the first days after an increase easier.
  • Fatty and very spicy foods can make nausea worse.
  • Vomiting or diarrhea speeds up fluid loss, so fluid intake matters more during this period.
  • For personal advice on eating and activity, ask your doctor or a dietitian.
  • Titration exists to reduce side effects; speeding up the schedule is not a use described in the product information.

Tracking the steps

Logging how long you stayed on each step and how you felt after each increase lets you give clear answers to your doctor's questions at a follow-up visit. Haftra keeps the dose, the injection day and your symptoms together; it does not suggest doses or calculate steps. It is free and can be used without an account.

iPhone, iPad and Apple Watch. Free.

Frequently asked questions

What happens when the dose goes up?

Side effects stand out at the start of treatment and again after each dose increase. They can return for a few days after a step up; the fluctuation usually eases as the body adjusts to the new dose and does not mean treatment is going badly.

Why start at the lowest dose?

These medications slow stomach emptying and prolong the feeling of fullness. Starting at a high dose markedly increases nausea, vomiting and diarrhea. Starting low lets you reach the same point with less discomfort.

When is the dose increased?

The time between steps and the amount vary by product and are written in the package leaflet. The shared principle in the product information is that the next step does not come before the set time on the current one has passed. Whether and when to step up is the prescriber's decision.

Is it mandatory to increase the dose every month?

No. At least 4 weeks on each step is a minimum, not a fixed schedule. Your doctor decides whether and when to step up, and may keep the dose the same.

What happens if I cannot tolerate a dose increase?

When a step is not well tolerated, the prescriber may decide to stay on it longer or go back one step. Describe your side effects to your doctor at the check-up.

What is the highest maintenance dose?

According to the prescribing information, the maximum weekly dose of Mounjaro and Zepbound is 15 mg. Wegovy's usual maintenance dose is 2.4 mg; the EU approved a higher 7.2 mg dose in February 2026. The label of the product you have is what applies.

Sources

Last reviewed: October 15, 2026