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GLP-1 Drugs Not Associated With Increased Risk of Diabetic Retinopathy, Study Finds

Mary Caffrey
The analysis of patient records found no elevated risk of retinopathy among those using glucagon-like peptide-1 (GLP-1) receptor agonists to treat type 2 diabetes.
Glucagon-like peptide-1 (GLP-1) receptor agonists are not associated with increased risk of incident diabetic retinopathy, according to a study published in Diabetes Care.

GLP-1 receptor agonists (RAs) lower blood sugar levels by promoting insulin secretion. Patients who use these drugs to treat type 2 diabetes not only see improved glycemic control but may also lose weight. In fact, one GLP-1 therapy, liraglutide, is approved in a formulation to treat obesity. Studies have also been published showing cardiovascular benefits for liraglutide and semaglutide, and FDA granted a cardiovascular indication for liraglutide last year.

Read About Once-Weekly Semaglutide

The SUSTAIN-6 study had pointed to a possible worsening of retinopathy with semaglutide, although this was not borne out in the SUSTAIN-7 trial prior to approval. The claims study published this week evaluated data from 77,115 patients in the United Kingdom who had type 2 diabetes (T2D) and began taking therapies between January 2007 and September 2015. Researchers compared those taking GLP-1 RAs with those taking 2 or more oral antidiabetic drugs and, in a separate analysis, compared those taking GLP-1 RAs with those taking insulin.

During 245,825 person-years of follow-up, 10,763 patients were newly diagnosed with diabetic retinopathy. Compared with those taking 2 or more oral drugs, the risk of retinopathy among those taking the GLP-1 class was the same (hazard ratio [HR], 1.00; 95% CI, 0.85-1.17). Those taking the GLP-1 class had a 33% reduced risk of retinopathy compared with those taking insulin (HR, 0.67; 95% CI, 0.51-0.90). The authors wrote that the apparent lower risk of diabetic retinopathy may be due to residual confounding.


Douros A, Filion KB, Yin H, et al. Glucagon-like peptide-1 receptor agonists and the risk of incident diabetic retinopathy [published online August 27, 2018]. Diabetes Care. 2018. doi: 10.2337/dc17-2280.

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