Blinding effects of Semaglutide of Semaglutide
1: Reduced Blood Flow to the Optic Nerve
Semaglutide can cause rapid weight loss, nausea, dehydration, and lower blood pressure, especially in the early weeks of treatment. These effects can slightly reduce the blood flow (perfusion) to the optic nerve — the structure responsible for sending visual signals to the brain.
2: Direct GLP-1 Receptor Effects on Nerve
GLP-1 receptors are not only found in the pancreas but also in blood vessel walls and nerve tissues, including those supplying the eye. Some scientists believe that Semaglutide may alter vascular tone, nitric oxide signaling, or inflammation in these areas. Although this idea is still being studied, it suggests that semaglutide might directly influence the health of the optic nerve’s microcirculation.
Conclusion
While Semaglutide is used in controlling diabetes and weightloss, emerging reports of vision-related side effects such as non-arteritic anterior ischemic optic neuropathy (NAION) have raised valid concerns. Current evidence does not confirm a direct cause-and-effect relationship, but the potential association underscores the importance of vigilance among patients and healthcare providers
AUTHOR: Moaz Farhan, (PharmD), Medical Writer
References
1:Wang, M., et al. (2025). Association between semaglutide use and optic nerve disorders: A cohort study. JAMA Network Open.
2:Zheng, X., et al. (2024). Glucagon-like peptide-1 receptor: Mechanisms and therapeutic potential. Nature Reviews Disease Primers.