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The European Medicines Agency's (EMA) Pharmacovigilance Risk Assessment Committee (PRAC) has initiated a review of semaglutide-containing medicines after concerns were raised regarding a potential increased risk of non-arteritic anterior ischemic optic neuropathy (NAION), a rare eye condition. Semaglutide, a glucagon-like peptide 1 receptor agonist (GLP-1 RA), is used in the treatment of diabetes and obesity, with medicines like Ozempic, Rybelsus, and Wegovy containing the active substance. A report from the PRAC highlighted two recent observational studies that suggest patients treated with semaglutide may face a higher risk of developing NAION. This condition, caused by reduced blood flow to the optic nerve, can result in vision loss in the affected eye. However, two other recent observational studies did not show an increased risk, according to the report.

The Medicines and Healthcare Products Regulatory Agency (MHRA) confirmed that Ozempic has been found at two UK wholesalers on 18 October. The pre-filled falsely labelled pens have been purchased from legitimate suppliers in Austria and Germany. However, there has been no evidence that fake Ozempic has been supplied to UK patients. Dr Alison Cave, MHRA Chief Safety Officer spoke about closely with regulatory partners to ensure patients' safety. He said: "Buying semaglutide from illegally trading online suppliers significantly increases the risk of getting a product either falsified or not licensed for use in the UK. "Products purchased in this way will not meet our strict quality and safety standards, and taking such medicines may put your health at risk," he added.

Following a comprehensive review, the Medicines and Healthcare products Regulatory Agency (MHRA) has concluded that current evidence does not support a causal link between Glucagon-Like Peptide-1 (GLP-1) receptor agonists and suicidal behaviour, suicidal ideation, self-injury, or depression. GLP-1 receptor agonists , which contain active ingredients such as exenatide, lixisenatide, liraglutide, dulaglutide, and semaglutide, are commonly used to treat type 2 diabetes and obesity. In July 2023, concerns were raised about the safety of these receptor agonists after post-marketing reports suggested a potential risk of suicidal thoughts and self-harm associated with these medications. As a result, safety reviews were initiated by the Market Authorisation Holders (MAHs), evaluating the UK post-marketing data to assess the potential risks of these drugs. These reviews also examined the risk of depression in the interest of patient safety following reports of these side effects.