Research ‘evolving rapidly’
“We will continue gathering more information on colonoscopy preparations and GLP-1 RA medication use, and whether the newer type 2 diabetes medications have a similar effect,” Dr. Vargas said. “The newer and upcoming medications are double and/or triple agonists, and it remains to be determined if these have a similar effect on gastric transit times.”
The recent lowering of the recommended colorectal cancer screening age for average-risk individuals to 45 combined with increasing use of GLP-1 RAs make it important to minimize repeat colonoscopies, he added.
“In the absence of specific guidance on timing of periprocedural discontinuation of GLP-1 RAs, clinicians can enhance counseling and educational efforts in this population,” Dr. Vargas suggested. They can also consider interventions such as “extending bowel preparation regimens, issuing a clear liquid diet recommendation 48-72 hours before colonoscopy, and nurse education visits on colonoscopy preparation.”
Commenting on the study, David A. Greenwald, MD, director of clinical gastroenterology and endoscopy at Mount Sinai Hospital, New York City, noted the potential confounding in a retrospective study, as well as the relatively small sample size. “Nonetheless, the findings make sense and are important to guide clinical decision-making,” he told this news organization.
Gastric emptying with GLP-1 RAs can lead to retained fluid and food in the stomach, which increase the risk for aspiration at endoscopy, he said.
“We are concerned about that primarily for upper endoscopy but have seen vomiting and aspiration occur during colonoscopy in patients who have been using [these] medications,” Dr. Greenwald said. It’s reasonable to postulate that GLP-1 RAs could delay passage of colonoscopy preps through the gastrointestinal tract, which would affect the outcome of prep, he added.
“Research around GLP-1 agonist use and endoscopy is evolving rapidly, and we hope to have data-driven guidance soon on whether these agents need to be held in the peri-endoscopic period, and if so, for how long,” Dr. Greenwald noted. “At the moment, guidance has been published but is very much driven by expert opinion and limited studies.”
The study received no financial support. Dr. Vargas and Dr. Greenwald report no relevant conflicts of interest.
A version of this article first appeared on Medscape.com.