European Medicines Agency(EMA) and the Heads of Medicines Agencies (HMA) are warning the public about the growing threat of illegal medicines being advertised and sold online across the European Union (EU). In recent months there has been a sharp rise in the number of illegal medicines marketed as GLP-1 receptor agonists such assemaglutide,liraglutideand tirzepatide for weight loss and diabetes. These products, often sold via fraudulent websites and promoted on social media, are not authorised and do not meet necessary standards of quality, safety and efficacy. Such illegal products pose a serious risk to public health. They may not contain the claimed active substance at all and may contain harmful levels of other substances. People who use these products are therefore at a very high risk of treatment failure, unexpected and serious health problems and dangerous interactions with other medicines. Authorities have identified hundreds of fake Facebook profiles, advertisements and e-commerce listings, many of which are hosted outside the EU. Some fraudulent websites and social media advertisements misuse official logos and use false endorsements to mislead consumers. Illegal suppliers are being actively monitored by national authorities. Enforcement actions include ordering product withdrawals, blocking websites and cross-border collaboration with enforcement officers and other international partners. As per EMA, GLP-1 receptor agonists are prescription medicines for serious health conditions such as diabetes and obesity. They should be taken under the supervision of a healthcare professional. Patients who think they might benefit from treatment with GLP-1 receptor agonists should talk to a doctor and should not buy them without a prescription or from sources other than legitimate retailers. The online sale of prescription only medicines is not allowed in all Member States. To help the public identify legitimate online medicine retailers, the EU introduced a common logo which appears on the websites of all registered online pharmacies and retailers. Clicking on the logo takes buyers to a national register of authorised retailers. If a website does not have this logo or is not listed on a national register, the website is fraudulent and operating illegally. The national flag and the text are an integral part of the logo. Only national flags of an EU Member State, as well as those of Norway, Iceland and Liechtenstein, can be displayed. A product is likely to be illegal if: