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Someone tried semaglutide for the first time and after two weekly low-dose injections started having stomach pain and diarrhea. They took 0.25 mg twice (one week apart), felt nothing the first week as expected, then had a bad night with abdominal cramps and repeated trips to the toilet. The symptoms continued into the next day. Semaglutide is the active medicine in drugs like Ozempic and Wegovy. It’s a molecule that copies a natural hormone your gut makes after eating, and it tells your brain you’re full and slows how fast your stomach empties. Doctors use it for type 2 diabetes and for helping people lose weight. When people start it, they usually begin at a very low dose and increase slowly to reduce side effects. This report is just one person’s experience — an anecdote, not a study. Clinical trials and drug labels say stomach upset, nausea, vomiting, and diarrhea are common when people start semaglutide, especially as doses increase. The poster used a low starting dose (0.25 mg), which many people tolerate, but some still get early digestive side effects. Because this is a single account, we can’t know if this was caused by semaglutide, something they ate, an infection, or another medication. Why it matters: if you or someone you know is starting semaglutide, this reminds you that digestive side effects are possible even at low doses. People who are nervous about nausea or whose jobs make frequent bathroom breaks difficult may want to plan the first few doses at a time when they can stay home and monitor symptoms. It’s also a reminder to follow the usual dose-escalation schedule your clinician recommends, since increasing gradually tends to reduce how badly side effects hit. Caveats and risks: this post isn’t medical advice. Most side effects from semaglutide are temporary and improve with time or dose adjustment, but severe dehydration from vomiting or diarrhea can be dangerous. Semaglutide isn’t right for everyone — people with certain medical histories (like a personal or family history of medullary thyroid cancer or certain pancreatitis concerns) should avoid it and should discuss risks with their doctor. If symptoms are severe, persistent, or include signs of dehydration or fainting, contact a healthcare provider or emergency care. Bottom line: some people get stomach upset soon after starting semaglutide, and while that’s often short-lived, any bad or lasting symptoms should be checked by a clinician.
Source: r/Semaglutide