GLP-1 receptor agonists mimic the actions of GLP-1 and are used to manage type 2 diabetes and help with weight loss. In recent times, antidiabetic GLP-1 receptor agonists have been misused widely for weight loss. This review article focuses on some serious side effects of GLP-1 receptor agonists, notified by different regulatory agencies. We searched the literature in online databases such as Medline/Pubmed/PMC, Google Scholar, Science Direct, Ebsco, Scopus, Web of Science, Embase, and reference lists to identify publications relevant to the serious side effects associated with the use of GLP-1 receptor agonists. Various pharmacovigilance analyses and notifications from different regulatory agencies have documented the occurrence of suicidal thoughts and self-injurious behavior associated with the use of GLP-1 receptor agonists. Healthcare professionals should be aware of GLP-1 receptor agonistsassociated suicidal thoughts and self-injurious behavior. Patients should not misuse/abuse antidiabetic GLP-1 receptor agonists and should consult their physician before using any GLP-1 receptor agonists for weight loss.