Mounjaro 2.5mg Price UK: Cheapest Starting Dose Compared (2026)
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Mounjaro 2.5mg is the mandatory starting dose for all new patients in the UK, taken for the first four weeks to let your body adjust before moving to higher doses. This page compares current UK prices — updated regularly.
Cost calculator
Estimate based on today's cheapest advertised price (£119.95/month). Actual cost depends on your pharmacy and any dose changes — not a quote.
Mounjaro 2.5mg Price UK: At a Glance
| Metric | Detail |
|---|---|
| Cheapest price (UK) | From £119.95 per pen |
| Pens per pack | 4 pens (4-week supply) |
| Dose frequency | Once weekly |
| Duration at this dose | 4 weeks (weeks 1–4) |
| Next dose | 5mg (week 5) |
For the full breakdown across all doses and pharmacies, use the MedEazy Mounjaro price comparison tool.
What Is Mounjaro 2.5mg Used For?
The 2.5mg dose isn't a therapeutic weight loss dose — it's an introductory dose purely to establish tolerability. At 2.5mg, most patients experience mild appetite reduction, minimal weight loss (typically 0.5–1.5kg over four weeks), and some nausea, particularly in the first 1–2 weeks. If side effects are intolerable, speak to your prescriber before increasing — some patients benefit from an extra four weeks at the starting dose.
Where 2.5mg Sits in the Full Schedule
- Weeks 1–4: 2.5mg — you are here
- Weeks 5–8: 5mg
- Weeks 9–12: 7.5mg
- Weeks 13–16: 10mg
- Weeks 17–20: 12.5mg
- Week 21+: 15mg
See the full Mounjaro dose schedule guide for what to expect at every stage.
Is Mounjaro 2.5mg Available on the NHS?
Yes — NHS prescriptions cover all doses including 2.5mg for eligible patients. See our NHS eligibility guide for the current cohort criteria.
How to Get the Best Price
- Compare across pharmacies — prices vary by up to 40% for the same dose
- Check subscription pricing — some pharmacies discount auto-refill plans
- Look for introductory offers on the starter dose
- Confirm GPhC registration — every pharmacy listed on MedEazy is verified
Frequently Asked Questions
How much does Mounjaro 2.5mg cost in the UK?
Private prices start from £119.95 per pen. Use the MedEazy price comparison to find today's cheapest price.
How long do you stay on 2.5mg?
Four weeks, then your prescriber will typically increase you to 5mg — the first therapeutic dose.
Do you lose weight on 2.5mg?
Some, but not much — typically 0.5–1.5kg in the first four weeks. This dose is mainly for tolerability.