GLP-1 agonists (semaglutide, dulaglutide, liraglutide) slow gastric emptying as part of their mechanism to control blood glucose and reduce appetite
Intraperitoneal glucose tolerance test (ipGTT) Ten-week-old C57BL/6 J mice (The Jackson Laboratory, Bar Harbor, ME, USA) were administered the indicated drugs (15 nmol/kg) and maintained for 24 h, prior to testing, including a 6-h fasting period immediately before the ipGTT
Long-acting agents seem to have a lower incidence of gastrointestinal adverse effects (166), likely due to tachyphylaxis in gastric emptying with sustained GLP-1R stimulation
doi: 10.1002/jsfa.7187 101 ZhuZ.GaoD.LiC.ChenY.ZhuM.LiuX.et al
Having an empty stomach decreases nausea and chances of vomiting, something you definitely want to avoid