Here's a simplified table summarizing their mechanism of action: A significant difference between sildenafil and tadalafil lies in their duration of action. Sildenafil (Viagra) generally has a shorter ...

Therefore, Viagra may be taken between 30 minutes to four hours ... ingredient but are studied and targeted for different ...

The impotence pill Viagra may be a useful treatment against ... "Because our findings only establish an association between sildenafil use and reduced incidence of Alzheimer's disease, we are ...