Does Semaglutide Make You Tired
Medically reviewed by Linda Girgis | MD, Girgis Family Medicine on August 20th, 2026.
Yes, semaglutide can cause fatigue, though it affects only 11-20% of users according to clinical trials. Fatigue typically occurs during the first 4-8 weeks as your body adjusts to the medication and reduced caloric intake. The tiredness often stems from eating significantly less food, which can temporarily lower energy levels until your metabolism adapts. Most patients find that fatigue decreases after the initial adjustment period, especially when they maintain adequate hydration and get sufficient sleep. If you're experiencing persistent fatigue on semaglutide, we can help you develop strategies to manage this side effect while maximizing your weight loss results.
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