Viagra could make you colour blind! Erection drug leaves 31-year-old man with red-tinted vision

An unnamed patient in New York has not been able to cure the red vision he has had for over a year since he took 'much more' than the recommended dose of sildenafil – the active ingredient in Viagra.

Source: the Mail online | Health - October 2, 2018 Category: Consumer Health News Source Type: news