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No clinically important effects on intraocular pressure after short-term administration of sildenafil citrate (Viagra).
Yajima T, Yajima Y, Koppiker N, Grunwald J E, Laties A M
Am J OphthalmolMay 200035 citationsClinical Trial
Sildenafil (Viagra) was studied for short-term effects on eye pressure. It showed no clinically important changes in intraocular pressure, suggesting it's safe for glaucoma patients.