Men who took erectile-dysfunction drug had blue-tinted vision for days. User Drew_Ferran, in the r/Sciences - Science on Reddit subreddit, 08 Feb 2020
Ocular Side Effects of Sildenafil That Persist Beyond 24 h—A Case Series (Men who took erectile-dysfunction drug had blue-tinted vision for days) User Drew_Ferran, in the Reddit Science subreddit, 08 Feb 2020