In 2026, surgeons described a woman in her 50s who restarted semaglutide at the full 2.4 mg weekly dose after several months off. She hadn't stepped back up through the doses. The next day she developed severe nausea and vomiting and a torn esophagus, which her surgeons thought the vomiting likely caused, and she spent months recovering (Aubrey et al., Journal of Cardiothoracic Surgery, 2026, DOI (external link)). That outcome is very rare. Going straight back to your old dose after a break is an easy mistake to make, though.
This guide is a by-drug reference for one question: what does each medication's FDA label say about restarting after a gap? It keeps two things apart: what the label actually says, and what's left to your prescriber's judgment. For a single late or forgotten dose, see what to do if you miss a GLP-1 dose. For the bigger picture on coming off, including weight regain, see stopping a GLP-1.
Why a gap resets your tolerance
GLP-1 doses start low and climb in steps because the stomach side effects (nausea, vomiting, diarrhea) are worst when the dose rises. Over weeks at each step, your body adapts. See how titration schedules work.