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Someone on Reddit asked for help after starting Mounjaro (tirzepatide) and losing about 9 kg in the first 30 days, then hitting a 15-day stall in weight loss after increasing their dose. They’re wondering what to do next. This is a real-world, single-person report — not a clinical study — so it’s an anecdote, useful for questions but not proof of how the drug works for everyone. Tirzepatide is the drug sold as Mounjaro. It’s a man-made version of hormones your gut makes after you eat that help control blood sugar and appetite. In simple terms, it tells your brain you’re less hungry and can slow how fast your stomach empties, so you feel full longer. It’s used for type 2 diabetes and is being explored for weight loss. It’s not a magic pill — it changes appetite and metabolism, which often leads to weight loss when combined with diet changes. What this Reddit post shows is one person’s early experience: a fast initial drop in weight, then a plateau after a dose increase. Individual responses vary a lot. Clinical trials of tirzepatide show many people lose significant weight, especially early on, but plateaus are common and expected. Weight can fall quickly at first because of reduced food intake and water loss, then slow as the body adjusts. A single anecdote can’t tell us whether the stall is due to needing time, calorie changes, fluid shifts, reduced activity, or the dose change itself. Why this matters: if you or someone you know is on Mounjaro, hearing that stalls happen can be reassuring. It suggests patience and tracking are useful. Practical steps commonly recommended by clinicians include reviewing calorie intake, checking for hidden calories (sauces, drinks), keeping up with activity, monitoring for constipation or other side effects that can affect weight, and giving the body several weeks to adapt after a dose change. It’s also a cue to touch base with your prescribing clinician — they can check glucose levels, rule out other causes, and discuss whether the dose increase or timing needs adjustment. There are important caveats. This post is not medical advice. Tirzepatide can cause side effects like nausea, diarrhea, constipation, and rarely more serious problems (pancreas or gallbladder issues have been reported). It’s approved for diabetes and prescribed off-label for weight loss in some places; access and guidance should come from a healthcare provider. People who are pregnant, have certain medical conditions, or are taking some medications need special caution. If weight stalls come with worrying symptoms — severe stomach pain, persistent vomiting, bloody stools, or signs of low blood sugar — seek medical help. Bottom line: a weight-loss plateau after an initial drop on Mounjaro is common and doesn’t automatically mean the drug isn’t working; check habits, be patient, and consult your clinician before making changes.
Source: r/Mounjaro