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How Penzilla checks prices

Penzilla draws on the daily price records published by four specialist UK price sites: Monj, iGovy, Ogovy and Dayo. Full citations.

Source and date for each medicine

• Mounjaro: Monj, last checked 8 October 2026
• Wegovy: iGovy, last checked 8 October 2026
• Wegovy pill: Ogovy, last checked 8 October 2026
• Foundayo: Dayo, last checked 8 October 2026

What each figure means

• First order: the lowest checkout total for a new customer, after the pharmacy's code or welcome offer.
• No discount: the lowest standard checkout total with no code or offer.
• Per week: the pen price divided by four.
• You save: the no discount price minus the first order price.

Every figure includes delivery and all fees.

Codes and offer links

The code or link shown for a pharmacy comes from the source site's offer page for the same pharmacy. Each panel shows the date the offer was last checked.

What we leave out

Penzilla shows the three cheapest first orders per dose. The complete ranked list for each medicine lives on the source site.

Registration checks

Listed pharmacies hold a GPhC registration, and each registration certificate is checked manually.

No paid placement

Price alone sets the order.

Limits

Pharmacies move prices and codes at any hour. Treat our figure as a guide and the pharmacy's checkout as final. Seen an error? Report a price.

Reuse

Quote any figure with the dose, pharmacy, date and a link. Copying tables wholesale requires written permission from Penzilla.