Certain GLP-1 medications have been linked to NAION, a rare eye condition that can cause sudden vision loss or potentially permanent vision impairment.

Tirzepatide
Mounjaro® | Zepbound®
Research is ongoing, and the evidence is less settled compared to semaglutide.

Semaglutide
Ozempic® | Wegovy® | Rybelsus®
Evidence for a potential association with NAION is more developed for semaglutide.

Other GLP-1s
Saxenda® | Victoza®
There is less available evidence at this time, but these medications are also discussed in the broader research.

Sudden blurry or dim vision
Vision that becomes unclear or noticeably darker.

A dark or missing area in your field of vision
Partial loss of vision or a blind spot.

Sudden partial or complete vision loss
Often in one eye and typically painless.

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NAION (Non-Arteritic Anterior Ischemic Optic Neuropathy) occurs when reduced blood flow to the optic nerve leads to damage. It can cause sudden, often painless vision loss in one eye, and the vision loss may be permanent.

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