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 71 UK pharmacies is £306.84. Dr Weightmans charges £280.00, which is 9% below the market average.

Frequently asked questions

How much does Mounjaro 15mg cost at Dr Weightmans?

Mounjaro 15mg at Dr Weightmans costs £280.00 per 4-week supply as of March 2026.

Is Dr Weightmans the cheapest for Mounjaro 15mg?

Dr Weightmans is ranked #10 out of 71 pharmacies for Mounjaro 15mg. The cheapest is £204.99 at Pharmacy Planet.

Does Dr Weightmans include consultation and delivery for Mounjaro 15mg?

Dr Weightmans does not include a consultation fee and does not include delivery in the £280.00 price.

Is Dr Weightmans GPhC registered?

Yes, Dr Weightmans is registered with the General Pharmaceutical Council (GPhC number: 1092500). You can verify this on the GPhC register.

Related comparisons

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

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