how soon after injection does semaglutide work to Lose Weight? How Long Does It Take

These symptoms are most common during dose adjustments and usually improve as your body adjusts to the medication

A drug that activates glucagon receptors carries theoretical risks: it could raise fasting blood sugar, accelerate muscle protein breakdown, or overstimulate the heart

Even a brisk 20-minute walk each day can make a difference and keep you moving toward your goals

This determines how much bacteriostatic water you'll add

Diarrhea is one of the most commonly reported side effects in retatrutide clinical trials, affecting anywhere from 9% to 35% of participants depending on dose level and study phase

Common Side Effects (Both Medications): Gastrointestinal Side Effects (Most Common): These typically occur when starting treatment or increasing doses, and often improve over time: Nausea: Most frequent side effect for both medications Semaglutide: 44% of participants in clinical trials Tirzepatide: 30-37% depending on dose Usually mild to moderate Most common in weeks 1-8, improves with continued use Diarrhea: Semaglutide: 30% of participants Tirzepatide: 19-23% depending on dose Often resolves within a few weeks Staying hydrated helps manage symptoms Constipation: Semaglutide: 24% of participants Tirzepatide: 10-17% depending on dose Can alternate with diarrhea Fiber and hydration help Vomiting: Semaglutide: 24% of participants Tirzepatide: 9-17% depending on dose More common at higher doses May require dose reduction Abdominal Pain: Semaglutide: 20% of participants Tirzepatide: 8-11% depending on dose Usually mild, related to slower stomach emptying Other Common Side Effects: Appetite Changes: Decreased appetite (desired effect) Food aversions or taste changes Reduced interest in previously enjoyed foods Early satiety (feeling full quickly) Fatigue: Semaglutide: 11% of participants Tirzepatide: Similar rates Often related to reduced calorie intake May improve as body adjusts Injection Site Reactions: Mild redness, swelling, or itching at injection site Usually resolves within a few days Rotating injection sites helps minimize Headache: Occurs in 10-14% of participants with both medications Usually mild and temporary Often related to dehydration Side Effect Comparison: Why Tirzepatide May Have Fewer GI Side Effects: Despite being more potent, tirzepatide appears to cause slightly less nausea and GI distress