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You left a box of Wegovy (the injectable pen with semaglutide) in a very hot room for about a week and are wondering if the medicine is ruined. Short answer: maybe, but probably not catastrophically so — and the safest move is to check storage guidance and, if in doubt, contact the pharmacy or manufacturer before using it. Wegovy contains semaglutide, a man-made version of a natural hormone that helps control appetite and blood sugar. It’s sold as a prefilled injectable pen and is designed to be kept either in the refrigerator or at controlled room temperature for a limited time, depending on the product instructions. The active drug itself is a peptide (a small chain of amino acids) that can break down when exposed to heat, light, or rough handling over time — which can reduce how well it works. What the manufacturers and pharmacists usually say is pretty specific: store unopened pens in the fridge, and once a pen has been taken out or the first dose has been used, there’s a maximum time it can be kept at room temperature — often around 30 days at up to about 86°F (30°C), but exact numbers vary by product and region. If the pen sat at around 90°F for a week, that’s above the usual recommended “room temperature” storage. That doesn’t guarantee the drug is useless, but it does mean the manufacturer’s tested conditions were exceeded, so there’s uncertainty about potency and safety. Why this matters to you is practical: if the drug has degraded, it might not work as well for weight loss or blood sugar control, and using a degraded product could mean you don’t get the benefits you expect. There’s generally low immediate danger from a spoiled peptide like semaglutide (it’s not toxic in the way that some spoiled foods are), but you could be paying for something that won’t help. Also, if you’re on a dosing schedule, an ineffective dose could affect medical plans that rely on predictable responses. Bottom line advice: find the storage instructions on the box or the patient leaflet and compare them to what happened. Call the pharmacy that dispensed it or the drug’s manufacturer customer service and describe the temperature and time; they can tell you whether to use it or get a replacement. If you can’t get a clear answer, err on the side of caution and ask for a replacement before injecting.
Source: r/Semaglutide