- **Q: What is NAION?
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News / Pharmaceuticals
Recent studies and lawsuits are raising concerns about a potential link between popular diabetes and weight loss drugs—Ozempic, Wegovy, and Mounjaro—and an increased risk of vision loss. This article breaks down the key findings and what yo...
### Background
Several studies have explored the potential link between GLP-1 receptor agonists and eye-related complications. A Harvard study indicated a four times higher risk of NAION for diabetes patients using semaglutide and a seven times higher risk for obese patients. A Danish study pointed to double the risk for diabetic patients. However, other studies have shown conflicting results.
### Recent Research
A study in *JAMA Network Open* found a modest increase in the rate of incident diabetic retinopathy (DR) among GLP-1 RA users but a reduction in the risk of vision loss progressing to blindness. Simultaneously, another study showed a slightly higher risk of NAION in patients treated with semaglutide or tirzepatide (Mounjaro) for diabetes.
### Regulatory and Legal Implications
The EMA has advised that patients experiencing sudden vision loss or worsening eyesight during semaglutide treatment should contact their doctor immediately and stop treatment if NAION is confirmed. The FDA has also launched a Sentinel study to evaluate the potential increased risk for sudden blindness.
Eli Lilly has requested the consolidation of NAION vision loss lawsuits into a multidistrict litigation (MDL) and assigned to the same judge overseeing gastroparesis lawsuits involving these medications.
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