Hormonal
Early rapid weight loss (≥15% by Week 24) with incretin-based obesity medications (tirzepatide or semaglutide) predicts greater overall efficacy (higher probability of achieving ≥25-30% total weight loss) without negatively impacting study completion rates, despite a numerically higher incidence of gastrointestinal and hepatobiliary adverse events.
If you are starting tirzepatide or semaglutide, losing weight quickly in the first few months is a good sign that you will likely achieve your long-term weight loss goals. While you may experience more stomach issues early on, this does not mean you will quit treatment. Monitor your health, manage side effects as needed, and trust that early rapid response is a positive predictor of success.
Although rapid responders experienced more gastrointestinal/hepatobiliary adverse events in both treatments, this did not affect rates of study treatment completion relative to non-rapid responders.
Why this rating
Based on a Phase 3b randomized controlled trial (SURMOUNT-5), though this specific finding is a post hoc analysis.
Source
Relationship of early rapid weight loss to efficacy and safety of tirzepatide and semaglutide for obesity: SURMOUNT-5 post hoc analysis
Louis J. Aronne et al. · The American Journal of Medicine · 2026
DOI 10.1016/j.amjmed.2026.03.010
Related findings · Hormonal
- Initial treatment for type 2 diabetes should be a combination of metformin and either an SGLT-2 inhibitor or a GLP-1 receptor agonist to achieve cardiorenal protection, rather than monotherapy or older agents like sulfonylureas.Strong
- For patients with specific monogenic obesity syndromes (leptin deficiency, POMC/PCSK1/LEPR mutations), targeted pharmacotherapy (recombinant leptin or setmelanotide) is highly effective and should be prioritized, unlike in polygenic obesity.Strong
- Continued weekly administration of 2.4 mg subcutaneous semaglutide prevents weight regain and promotes further weight loss in adults with overweight or obesity, whereas switching to placebo results in significant weight regain.Strong
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →