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Aim  To investigate the effects of once‐weekly subcutaneous (s.c.) semaglutide 2.4 mg on gastric emptying, appetite, and energy intake in adults with obesity.    Materials and Methods  A double‐blind, parallel‐group trial was conducted in 72 adults with obesity, randomized to once‐weekly s.c. semaglutide (dose‐escalated to 2.4 mg) or placebo for 20 weeks. Gastric emptying was assessed using paracetamol absorption following a standardized breakfast. Participant‐reported appetite ratings and Control of Eating Questionnaire (CoEQ) responses were assessed, and energy intake was measured during ad libitum lunch.    Results  The area under the concentration–time curve (AUC) for paracetamol 0 to 5 hours after a standardized meal (AUC 0–5h,para ; primary endpoint) was increased by 8% ( P  = 0.005) with semaglutide 2.4 mg versus placebo at week 20 (non‐significant when corrected for week 20 body weight;  P  = 0.12). No effect was seen on AUC 0–1h,para , maximum observed paracetamol concentration, or time to maximum observed paracetamol concentration. Ad libitum energy intake was 35% lower with semaglutide versus placebo (1736 versus 2676 kJ; estimated treatment difference −940 kJ;  P  <0.0001). Semaglutide reduced hunger and prospective food consumption, and increased fullness and satiety when compared with placebo (all  P  <0.02). The CoEQ indicated better control of eating and fewer/weaker food cravings with semaglutide versus placebo ( P  <0.05). Body weight was reduced by 9.9% with semaglutide and 0.4% with placebo. Safety was consistent with the known profile of semaglutide.    Conclusions  In adults with obesity, once‐weekly s.c. semaglutide 2.4 mg suppressed appetite, improved control of eating, and reduced food cravings, ad libitum energy intake and body weight versus placebo. There was no evidence of delayed gastric emptying at week 20, assessed indirectly via paracetamol absorption.

The effect of semaglutide 2.4 mg once weekly on energy intake, appetite, control of eating, and gastric emptying in adults with obesity