What to expect from your first 7 days on a GLP-1
www.weightwatchers.com
Sept. 26, 2026, 7:26 a.m.
GLP-1 medications, including semaglutide (Ozempic, Wegovy), tirzepatide (Zepbound, Mounjaro), and similar drugs, require careful dose titration during the initial treatment phase. During the first seven days, patients should expect their bodies to adjust to the lowest starting dose while experiencing variable effects such as reduced appetite, mild nausea, early fullness, fatigue, or digestive changes. According to Dr. Robert Kushner from Northwestern University Feinberg School of Medicine, this gradual dose escalation strategy minimizes gastrointestinal side effects including nausea, vomiting, diarrhea, and constipation. Early symptom experiences vary significantly among patients and do not predict long-term medication tolerance or eventual weight loss outcomes. Healthcare professionals recommend establishing sustainable habits during this critical first week, including consistent hydration, protein-rich nutrition, mindful meal pacing, and gentle movement. These foundational practices, combined with tracking individual responses, establish the behavioral patterns necessary for medication efficacy over the long term.