MHRA and partners unite to reaffirm Rx weight-loss meds advertising rules

27 September 2025

The UK’s Medicines and Healthcare products Regulatory Agency (MHRA), in partnership with the Advertising Standards Authority (ASA) and General Pharmaceutical Council (GPhC), has this week jointly released an updated Enforce Notice, to reiterate the rules around the advertising of prescription-only medicines (POMs) used for weight management.

The GLP-1 agonists weight loss drugs market in UK is expected to reach a projected revenue of $715.1 million by 2030, up from $222.4 million in 2024. A compound annual growth rate of 17.7% is expected of UK GLP-1 agonists weight loss drugs market from 2025 to 2030, according to Grand View Horizon.

The updated notice is directed at businesses, primarily pharmacies, that make these medicines available to the public and provides important clarity on the kinds of claims and images in an ad that are likely to break the rules.

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