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 93 UK pharmacies is £306.58. Pharmacy Online charges £299.99, which is 2% below the market average.

Pharmacy Online discount codes

£10 offNew customers

£10 Off 1st Orders

FIRST10

View all discount codes →

Frequently asked questions

How much does Mounjaro 15mg cost at Pharmacy Online?

Mounjaro 15mg at Pharmacy Online costs £299.99 per 4-week supply as of April 2026.

Is Pharmacy Online the cheapest for Mounjaro 15mg?

Pharmacy Online is ranked #46 out of 93 pharmacies for Mounjaro 15mg. The cheapest is £209.99 at Pharmacy Xpress.

Does Pharmacy Online include consultation and delivery for Mounjaro 15mg?

Pharmacy Online does not include a consultation fee and does not include delivery in the £299.99 price.

Is Pharmacy Online GPhC registered?

Yes, Pharmacy Online is registered with the General Pharmaceutical Council (GPhC number: 9011756). You can verify this on the GPhC register.

Related comparisons

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

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