Hormonal
Long-term use of FDA-approved obesity medications (orlistat, lorcaserin, phentermine/topiramate-ER) combined with lifestyle interventions produces statistically significant additional weight loss compared to placebo alone, with efficacy varying by drug class.
If you are struggling to maintain weight loss through diet and exercise alone, FDA-approved medications like Orlistat (120mg, 3x daily) can provide an additional 3-4% weight loss compared to lifestyle changes alone. This benefit comes with gastrointestinal side effects that are mitigated by keeping fat intake low. It is most effective when used as an adjunct to, not a replacement for, lifestyle interventions.
Obesity medications approved for long-term use, when prescribed with lifestyle interventions, produce additional weight loss relative to placebo ranging from approximately 3% of initial weight for orlistat and lorcaserin to 9% for top-dose (15/92 mg) phentermine plus topiramate–extended release at 1 year.
Why this rating
Based on systematic review of randomized, placebo-controlled trials and meta-analyses with large sample sizes and intention-to-treat analysis.
Source
Long-term Drug Treatment for Obesity
Susan Z. Yanovski et al. · JAMA · 2013
DOI 10.1001/jama.2013.281361
More from this paper
- Phentermine plus topiramate-extended release (top dose) is the most effective FDA-approved obesity medication for long-term weight loss, producing approximately 9% weight loss relative to placebo at 1 year.Strong
- Lorcaserin produces modest but clinically meaningful weight loss (approx 3.2% more than placebo) with a favorable side effect profile compared to other agents, though long-term cardiovascular safety requires monitoring.Strong
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