alexa Two-year sustained weight loss and metabolic benefits with controlled-release phentermine topiramate in obese and overweight adults (SEQUEL): a randomized, placebo-controlled, phase 3 extension study.
Toxicology

Toxicology

Journal of Clinical Toxicology

Author(s): Garvey WT, Ryan DH, Look M, Gadde KM, Allison DB,

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Abstract BACKGROUND: Obesity is a serious chronic disease. Controlled-release phentermine/topiramate (PHEN/TPM CR), as an adjunct to lifestyle modification, has previously shown significant weight loss compared with placebo in a 56-wk study in overweight and obese subjects with ≥2 weight-related comorbidities. OBJECTIVE: This study evaluated the long-term efficacy and safety of PHEN/TPM CR in overweight and obese subjects with cardiometabolic disease. DESIGN: This was a placebo-controlled, double-blind, 52-wk extension study; volunteers at selected sites continued with original randomly assigned treatment [placebo, 7.5 mg phentermine/46 mg controlled-release topiramate (7.5/46), or 15 mg phentermine/92 mg controlled-release topiramate (15/92)] to complete a total of 108 wk. All subjects participated in a lifestyle-modification program. RESULTS: Of 866 eligible subjects, 676 (78\%) elected to continue in the extension. Overall, 84.0\% of subjects completed the study, with similar completion rates between treatment groups. At week 108, PHEN/TPM CR was associated with significant, sustained weight loss (intent-to-treat with last observation carried forward; P < 0.0001 compared with placebo); least-squares mean percentage changes from baseline in body weight were -1.8\%, -9.3\%, and -10.5\% for placebo, 7.5/46, and 15/92, respectively. Significantly more PHEN/TPM CR-treated subjects at each dose achieved ≥5\%, ≥10\%, ≥15\%, and ≥20\% weight loss compared with placebo (P < 0.001). PHEN/TPM CR improved cardiovascular and metabolic variables and decreased rates of incident diabetes in comparison with placebo. PHEN/TPM CR was well tolerated over 108 wk, with reduced rates of adverse events occurring between weeks 56 and 108 compared with rates between weeks 0 and 56. CONCLUSION: PHEN/TPM CR in conjunction with lifestyle modification may provide a well-tolerated and effective option for the sustained treatment of obesity complicated by cardiometabolic disease. This trial was registered at clinicaltrials.gov as NCT00796367.
This article was published in Am J Clin Nutr and referenced in Journal of Clinical Toxicology

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