Glucagon-like Peptide-1 Receptor Agonists: Are They as Good as They Seem? A Systematic Review of Severe Adverse Effects

Abstract

As obesity evolves as a global pandemic, the use of drugs to treat it is booming. The latest among these are Glucagon-like peptide-1 receptor agonists (GLP-1 RAs). Along with their use, the incidence of adverse events has become more common. Although severe effects have been mentioned, details and associations are unclear regarding some of them. We performed a systematic review of studies related to GLP-1 RA drugs. Drugs that have been the subject of at least three studies meeting all our criteria were included. Analysis of GLP-1 RA therapies across eight studies, involving 4422 subjects, indicated varying rates of Serious Adverse Events (SAEs). Semaglutide demonstrated an SAE incidence of 8.9%, compared to 6.2% for Liraglutide. These results were not statistically significant. For both drugs, no clear association with pancreatitis or neoplasm was established. Discontinuation rates due to adverse effects were 10.3% for Semaglutide and 8.3% for Liraglutide. Severe adverse effects with GLP-1 RA use are not uncommon, and warrant further close monitoring when patients are started on treatment. Further studies are required to analyze the difference between the adverse effect profiles of each drug and to assess whether or not each of these severe adverse effects is dose dependent.