Titration — the process of gradually increasing a medication dose — is a standard approach for GLP-1 based treatments. For Mounjaro (tirzepatide), the titration schedule helps your body adjust to the drug's effects on your digestive system, appetite, and blood sugar, reducing the severity of side effects along the way.
The Full Titration Schedule
The recommended titration schedule for Mounjaro is as follows:
- Weeks 1–4: 2.5 mg weekly (initiation dose)
- Weeks 5–8: 5 mg weekly (first maintenance dose)
- Weeks 9–12: 7.5 mg weekly (titration step)
- Weeks 13–16: 10 mg weekly (second maintenance dose)
- Weeks 17–20: 12.5 mg weekly (titration step)
- Week 21 onwards: 15 mg weekly (maximum maintenance dose)
Each dose increase occurs at a minimum of four-week intervals. Your prescriber may extend any step if needed.
Understanding Maintenance vs Titration Doses
It's important to understand the distinction:
- Maintenance doses (5 mg, 10 mg, 15 mg) are the target doses where the full therapeutic effect is expected
- Titration doses (2.5 mg, 7.5 mg, 12.5 mg) are stepping stones designed to improve tolerability
Your prescriber will decide which maintenance dose is right for you. Not everyone needs to reach 15 mg.
What Happens If You Titrate Too Quickly?
Rushing through the titration schedule can lead to more intense gastrointestinal side effects, including:
- Severe nausea and vomiting
- Significant diarrhoea or constipation
- Dehydration (which can be serious if not addressed)
- Greater likelihood of discontinuing treatment
This is why the four-week minimum at each dose level is important — it gives your body time to adapt.
What Happens If You Titrate Too Slowly?
There's no clinical harm in taking longer at any dose level. Some patients stay at a lower dose for six or eight weeks before moving up, especially if side effects are lingering. The downside is simply that it takes longer to reach your target dose and potentially delays the full benefit of treatment.
Restarting After a Break
If you miss several weeks of Mounjaro (for example, due to supply issues or illness), your prescriber may recommend restarting at a lower dose rather than resuming where you left off. This reduces the risk of side effects when restarting. Always consult your prescriber rather than making this decision yourself.
Tracking Your Progress
Many UK patients find it helpful to keep a simple log of their titration, noting their dose, injection date, any side effects, and weekly weight. This information is invaluable for discussions with your prescriber about whether and when to increase.