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Someone on an online forum wrote that they started taking semaglutide on November 2, giving themselves a small injection under the skin, and then described how they felt over the next day or two. They said the first evening felt normal, but by the next morning they woke up nauseous and constipated. The post is an ongoing personal diary — one person’s early experience, not a formal study. Semaglutide is the drug that’s in brand-name medicines like Ozempic and Wegovy. It’s a man-made version of a hormone your gut makes after you eat. That hormone tells your brain “you’re full” and also slows how quickly your stomach empties. Doctors use semaglutide for type 2 diabetes and for weight management because it reduces appetite and can lower blood sugar. People inject it under the skin, usually once a week, starting at a very low dose that’s slowly increased to reduce side effects. This particular post is a single-person report of the very first dose at 0.25 mg, which is a common starting dose. The takeaway is simple: the person felt fine the first day, then developed nausea and constipation the next morning. That pattern fits what is already known from larger studies and drug labels: gastrointestinal symptoms like nausea, vomiting, diarrhea, constipation, and stomach discomfort are common, especially when people first start semaglutide or when the dose is increased. But remember: this is just one person’s early notes. It doesn’t tell us how often this happens overall or how long their symptoms lasted. Why this matters to regular people is practical. Lots of people are curious about semaglutide because of its effects on appetite and weight. Hearing a real person say they felt nauseous the day after the first shot helps set expectations: short-term stomach issues are common. If you’re considering semaglutide, planning ahead for possible nausea or changes in bowel habits during the first few weeks — and coordinating with your prescriber — is sensible. It’s also useful for family or friends who might be supporting someone on the drug. There are important caveats. A single anecdote can’t tell you how safe or effective the drug will be for any one person. Semaglutide has known side effects and some rare but serious risks; it’s prescription-only and should be started under medical supervision. People with certain conditions — for example a personal or family history of certain thyroid tumors, or severe pancreatitis — may need extra caution. If nausea or constipation are severe or persistent, the right steps are to contact the prescribing clinician; sometimes slowing dose increases or treating symptoms helps. Bottom line: this diary entry matches common early-side-effect experiences with semaglutide — mild stomach problems after the first dose — but it’s only one person’s story and not a substitute for medical advice.
Source: r/Semaglutide