A study published in the Archives of Otolaryngology found that hearing loss in men over 40 occurred twice as often among those taking Viagra.
Dr. Whelan notes, This isn t the first time this has been reported. The FDA warned of this side effect in 2007.
Twice the rate of hearing loss is significant, says Dr. Ross. However, this study is based on self-reported hearing impairment, not hearing tests, so it is subject to some imprecision.