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. WePrescribe charges £299.99, which is 2% below the market average.

WePrescribe discount codes

£42 offNew customers

£41.50 Off 1st Orders

FIRST4150

View all discount codes →

Frequently asked questions

How much does Mounjaro 15mg cost at WePrescribe?

Mounjaro 15mg at WePrescribe costs £299.99 per 4-week supply as of March 2026.

Is WePrescribe the cheapest for Mounjaro 15mg?

WePrescribe is ranked #28 out of 71 pharmacies for Mounjaro 15mg. The cheapest is £204.99 at Pharmacy Planet.

Does WePrescribe include consultation and delivery for Mounjaro 15mg?

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

Is WePrescribe GPhC registered?

Yes, WePrescribe is registered with the General Pharmaceutical Council (GPhC number: 9012132). You can verify this on the GPhC register.

Related comparisons

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

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