The 15mg pen is the highest available Mounjaro dose. Clinical trials showed an average 20.9% body weight loss at this level. Not everyone needs to reach 15mg — your prescriber will determine the optimal dose for you.

The average price for Mounjaro 15mg across 70 UK pharmacies is £305.22. Boots charges £334.97, which is 10% above the market average.

Frequently asked questions

How much does Mounjaro 15mg cost at Boots?

Mounjaro 15mg at Boots costs £334.97 per 4-week supply as of March 2026.

Is Boots the cheapest for Mounjaro 15mg?

Boots is ranked #63 out of 70 pharmacies for Mounjaro 15mg. The cheapest is £204.99 at Pharmacy Planet.

Does Boots include consultation and delivery for Mounjaro 15mg?

Boots does not include a consultation fee and does not include delivery in the £334.97 price.

Is Boots GPhC registered?

Yes, Boots is registered with the General Pharmaceutical Council (GPhC number: 1034053). You can verify this on the GPhC register.

Related comparisons

Compare all pharmacies for 15mg →Boots — all doses →Compare all Mounjaro prices →All discount codes →

Prices updated March 2026. Always confirm with the pharmacy before ordering.