Weekly injection, tirzepatide
Mounjaro 12.5 mg
12.5 mg is the last step before the top dose, for people still losing weight on 10 mg who have started to plateau.
In short: Mounjaro 12.5 mg is an optional step. The next step is 15 mg after at least 4 weeks. Aero’s prices are not yet confirmed.
What to expect on 12.5 mg
Side effects at this step are usually familiar by now. Constipation and reflux can become more noticeable than nausea. Your prescriber reviews whether 15 mg adds enough to be worth the step.
| Detail | Information |
|---|---|
| Dose | 12.5 mg once a week |
| Stage | Optional step |
| Price | To be confirmed |
| Minimum time at this dose | 4 weeks before any step up |
| Next step | 15 mg (highest dose) |
| Missed dose | Take the missed dose as soon as possible within 4 days of the missed dose. |
| Storage | Store in a refrigerator at 2 to 8 degrees C. |
Price for Mounjaro 12.5 mg
Aero’s treatment prices and service inclusions will be confirmed before booking opens. Ask which prescribing, dispensing, delivery and follow-up costs are included in your quote.
Per week
Aero’s prices are not yet confirmed.
Aero’s prices are not yet confirmed.
Side effects at 12.5 mg
Rates below come from the UK product information at 15 mg, the dose most studied. Side effects cluster in the week after each step up and usually ease within two to three weeks. Severe stomach pain which does not ease needs urgent care.
| Side effect | On 15 mg | On placebo |
|---|---|---|
| Nausea | 28% | 8.5% |
| Diarrhoea | 22.5% | 7.8% |
| Vomiting | 13% | 2% |
| Constipation | 11% | 5% |
Mounjaro 12.5 mg questions
How long do I stay on Mounjaro 12.5 mg?
At least 4 weeks. Your prescriber only moves you up when you have tolerated the dose and are ready for the next step. You can stay longer if weight loss is going well.
How much does Mounjaro 12.5 mg cost?
Aero’s treatment prices are not yet confirmed. Before paying, ask for the total price, pack quantity, prescribing fees, dispensing and delivery charges, and follow-up costs. Use your provider’s written quote in the cost planner.
What if I miss a dose of Mounjaro 12.5 mg?
Take the missed dose as soon as possible within 4 days of the missed dose. If more than 4 days have passed, skip the dose and take the next one on the usual day. Leave at least 3 days between two doses. Do not take a double dose.
Can I start on Mounjaro 12.5 mg?
No. Everyone starts on 2.5 mg. Starting higher raises the chance of severe nausea and vomiting. If you are switching from another provider, your prescriber can continue you on your current dose with proof of supply.
When should I move from 12.5 mg to 15 mg?
Your prescriber decides whether a further increase is needed. Mounjaro’s UK schedule requires at least four weeks at the current dose before another increase. Discuss treatment response and side effects; do not increase the dose simply because another month has passed.
Mounjaro plan price to be confirmed
Aero’s treatment prices and service inclusions will be confirmed before booking opens. Ask which prescribing, dispensing, delivery and follow-up costs are included in your quote.
Page information
- Summary
- Mounjaro 12.5 mg: its place in the dose schedule, side effects, storage and questions for your prescriber. Aero Clinic’s prices are not yet confirmed.
- Publisher
- Aero Clinic, operated by AERO HEALTHCARE LTD.
- Editorial update
- Clinical review
- Pending. An editorial update is not a clinical sign-off.
Cite as: Mounjaro 12.5 mg, Aero Clinic (https://www.cagri.co.uk), AERO HEALTHCARE LTD. https://www.cagri.co.uk/mounjaro-12-5mg. Editorial update: 4 November 2026. Clinical review pending.