Mounjaro 12.5mg Price UK: Cheapest Pharmacies Compared (2026)
Share
Mounjaro 12.5mg is the penultimate dose in the titration schedule, reached at week 17. It sits just below the maximum 15mg dose and delivers near-maximum weight loss results.
Cost calculator
Estimate based on today's cheapest advertised price (£246/month). Not a quote.
Mounjaro 12.5mg Price UK: At a Glance
| Metric | Detail |
|---|---|
| Cheapest price (UK) | From £246 per pen |
| Duration at this dose | 4 weeks minimum (weeks 17–20) |
| Previous dose | 10mg (weeks 13–16) |
| Next dose | 15mg (week 21, maximum) |
Should You Increase from 12.5mg to 15mg?
The difference between 12.5mg and 15mg in clinical trials is relatively modest — approximately 1.5–2% additional body weight loss (estimated ’21% at 12.5mg vs 22.5% at 15mg). Some patients and prescribers decide 12.5mg offers a good balance of efficacy and cost given the £20/pen increase to 15mg. Discuss your progress with your prescriber.
Full Titration Schedule
- Weeks 1–4: 2.5mg
- Weeks 5–8: 5mg
- Weeks 9–12: 7.5mg
- Weeks 13–16: 10mg
- Weeks 17–20: 12.5mg — you are here
- Week 21+: 15mg
Full details: Mounjaro dose schedule guide.
Frequently Asked Questions
How much does Mounjaro 12.5mg cost?
Private prices start from £246 per pen. See the MedEazy comparison tool.
Is 12.5mg worth it over 10mg?
SURMOUNT data suggests approximately 21% weight loss at 12.5mg vs 19.5% at 10mg — a meaningful clinical difference. Whether the added cost is worth it depends on your progress and goals.