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Someone on a forum asked about their third day on a low dose of semaglutide and described new mild side effects: a headache, much stronger loss of appetite, and slightly more frequent bathroom visits. They said the first two days were mostly just less hunger, but on day three they’re having to force themselves to eat protein and wanted to know what others experienced and what people are eating while on semaglutide. Semaglutide is the active drug in medications like Ozempic and Wegovy. In plain terms, it acts like a natural gut hormone that tells your brain you’re full and slows how quickly your stomach empties. That combination reduces hunger and makes meals feel more satisfying and longer-lasting. Doctors prescribe different doses for diabetes or weight management, and people usually start on a low dose and ramp up to lower the chance of side effects. What this post shows is a single person’s early experience on a low starting dose, not a controlled study. It’s common for people to report reduced appetite within days, and early side effects often include nausea, headaches, stomach upset, or more frequent bowel movements. Those effects tend to be mild for some people and stronger for others, and they often improve after a few days to weeks as the body adjusts. But this anecdote doesn’t tell us how typical the reaction is or how long it will last for that person. Why it matters: anyone thinking about semaglutide for weight loss or diabetes should know these early adjustments are expected. Appetite suppression is the intended effect and can help with eating less, but some people find it so strong that they need to plan meals to get enough protein and nutrients. If you’re monitoring a loved one on the drug, or considering it yourself, it helps to know to start low, eat small protein-rich meals if eating is hard, and watch for dehydration or dizziness from skipping meals. Caveats and risks: this is a single-person report, not a medical study. Semaglutide can cause side effects including nausea, vomiting, constipation or diarrhea, headaches, and sometimes low blood sugar in people on diabetes medications. Rare but more serious issues have been reported, like gallbladder problems or pancreatitis, though those are less common. Don’t start or stop prescription meds based on forum posts—talk with your prescribing clinician about dose schedules, how to manage side effects, and who shouldn’t use it (for example, people with certain personal or family histories should avoid it). If side effects are severe, persistent, or you can’t eat or drink enough, seek medical advice. Bottom line: reduced appetite and mild GI or headache symptoms in the first days are common with semaglutide, but experiences vary, so check with your clinician about managing side effects and ensuring adequate nutrition.
Source: r/Semaglutide