Effects of solriamfetol treatment on body weight in participants with obstructive sleep apnea or narcolepsy

Objectives: This analysis characterized changes in weight in participants with obstructive sleep apnea (OSA) or narcolepsy treated with solriamfetol (SunosiTM) 37.5 (OSA only), 75, 150, or 300 mg/d. Methods: In two 12-week, randomized, placebo-controlled trials and one 1-year open-label extension study, changes in weight were evaluated from baseline to end of study (week 12 or week 40 of the open -label extension [after up to 52 weeks of solriamfetol treatment]) in participants with OSA or narcolepsy. Results: After 12 weeks of solriamfetol treatment, median percent change in weight from baseline across all solriamfetol doses was-0.84%, compared with 0.54% for placebo, in participants with OSA; and-0.07%, compared with 3.08% for placebo, in participants with narcolepsy. After up to 52 weeks of solriamfetol treatment, overall median percent change in weight from baseline was-1.76%, which showed a dose-dependent pattern (75 mg, 0.57%; 150 mg,-1.2%; 300 mg,-2.5%).Results were similar in subgroups of participants with OSA or narcolepsy, with overall median percent changes in weight of-2.2% and-1.1%, respectively. After up to 52 weeks of solriamfetol treatment, the percentage of participants with weight loss >= 5% relative to baseline was 25.7% overall and increased in a dose -dependent manner (75 mg, 4.5%; 150 mg, 17.3%; 300 mg, 32.4%). Results were similar among sub-groups of participants with OSA or narcolepsy, with 26.4% and 24.2% of participants experiencing weight loss >= 5%, respectively. No weight-related treatment-emergent adverse events were serious.Conclusions: Solriamfetol treatment was associated with decreases in body weight in a dose-related manner.(c) 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).