The most common Mounjaro side effects — nausea, constipation, diarrhoea, reduced appetite and tiredness — tend to appear or worsen in the days after a dose increase. They usually settle as your body adjusts. Increasing the dose too quickly is the most common reason people feel rough.
Titrate slowly
The standard schedule starts at 2.5mg for four weeks, then steps up by 2.5mg with at least four weeks at each level. There's no obligation to keep climbing — staying longer on a dose you tolerate well is completely reasonable, and the right dose is the lowest one that works for you.
Gentler steps with click-counting
Some people find even a 2.5mg jump hard to tolerate. By counting clicks you can step up more gradually — for example 2.5mg to 3mg to 3.5mg — instead of going straight to 5mg. The titration planner maps out these smaller steps and the exact clicks for each. Always agree a non-standard schedule with your prescriber first.
When to seek advice
Mild side effects often improve with smaller, more frequent meals, staying hydrated and avoiding fatty foods. Contact your prescriber or pharmacist if side effects are severe, persistent, or if you have signs of dehydration or severe abdominal pain. This article is general information, not medical advice.