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Someone on an online forum posted that after several months on Wegovy they’re still getting very sick for about a day after each injection. They’re on 1 mg now and have had three injections at that dose. After nearly every shot they say they get severe nausea, extreme tiredness, and a flu-like feeling that lasts roughly 24 hours. They’re worried and asking if anyone else has had the same experience. Wegovy is a brand name for a drug whose active ingredient is semaglutide. Semaglutide is a man-made version of a natural hormone your gut makes after you eat. That hormone talks to your brain to reduce appetite and slows how fast your stomach empties, which helps some people eat less and lose weight. It’s given as a once-weekly injection and doctors usually increase the dose slowly over a few months to help people tolerate it. The post is a single-person report — basically an anecdote — not a controlled study. Clinical trials of semaglutide did show common side effects like nausea, vomiting, diarrhea, constipation, and tiredness, especially when people first start or when doses go up. But trial participants usually see these side effects improve over time for many people. Since this is one user’s report, we can’t know how typical their experience is, how severe it will remain, or whether anything about their health or other medications is contributing. There’s no systematic data in the snippet about how often this severe 24-hour reaction happens at the 1 mg dose. Why this matters: lots of people are trying Wegovy or similar medicines for weight management, and side effects determine whether someone can keep using the drug. If injections cause a full day of incapacitating nausea and fatigue every week, that’s a real quality-of-life problem. People considering the drug, or who are already on it and suffering, want to know if what they’re feeling is normal, temporary, or a sign to change course. It also matters for doctors deciding whether to slow dose increases, switch medications, or look for other causes. Caveats and risks: this is one person’s story, so it doesn’t prove the drug will do the same for everyone. Semaglutide can cause gastrointestinal symptoms and sometimes fatigue; people with a history of pancreatitis, certain thyroid cancers, or serious gallbladder disease need particular caution and should discuss risks with their clinician. If side effects are severe, persistent, or include symptoms like severe abdominal pain, fainting, difficulty breathing, or signs of an allergic reaction, they should seek medical attention. A doctor may recommend pausing dose increases, lowering the dose, changing the injection schedule, or switching therapies. Bottom line: a person on Wegovy reports regular, day-long bouts of nausea and fatigue after injections — this aligns with known side effects for some users, but it’s an individual account, so talk to a clinician to weigh options and rule out other causes.
Source: r/Semaglutide