I didn't know about that, not mentioned here before. Gemini Daily low-dose tadalafil (5 mg) is generally considered safe for long-term eye health for the vast majority of men, but it does carry a small, well-documented risk of rare, serious ocular side effects. Potential Risks & Eye Conditions 1. Rare, Severe Eye Conditions (Very Low Absolute Risk) Large observational studies show an association between regular PDE5 inhibitor use (tadalafil, sildenafil) and a slightly elevated risk for a few specific vascular eye conditions: NAION (Non-Arteritic Anterior Ischemic Optic Neuropathy): A sudden, usually painless loss of vision in one eye caused by reduced blood flow to the optic nerve. Risk factors include high blood pressure, diabetes, high cholesterol, and a naturally "crowded" optic disc. Retinal Vascular Occlusion (RVO): A blood clot affecting vessels in the retina. Serous Retinal Detachment / CSCR: Fluid accumulation under the retina. Glaucoma: Recent population data suggests long-term daily use may be linked to a small relative increase in glaucoma risk (attributed to changes in ocular blood pressure/fluid dynamics). While these sound alarming, the absolute risk remains low—affecting a very small fraction of total users. 2. Mild, Temporary Visual Side Effects Compared to sildenafil (Viagra), tadalafil has much less impact on the PDE6 enzyme in the retina. Temporary color tinting (blue vision) or light sensitivity are significantly less common with tadalafil. Key Precautions When to Stop Immediately: If you ever experience sudden vision loss or significant blurry vision in one or both eyes, stop taking tadalafil and seek emergency medical evaluation right away. Pre-existing Eye Conditions: If you have Retinitis Pigmentosa, a history of NAION, or advanced glaucoma, discuss this with your ophthalmologist before starting daily tadalafil. Routine Eye Exams: Mentioning your tadalafil routine during your regular annual eye exam gives your eye doctor a chance to check your optic nerve and eye pressure.
