If you search the Internet for cialis sildenafil , you will probably get confused. Cialis contains the active substance tadalafil, while Viagra contains tadalafil. These drugs have a similar mechanism of action and effect, as they belong to the group of PDE5 inhibitors. The main difference is that Viagra lasts 4-6 hours, while Cialis lasts 36 hours. Talk to your doctor to determine which medication is best for you
The instructions may give a detailed answer to the question who created viagra . In short, in 1996 the American company Pfizer introduced the active ingredient sildenafil citrate, later called Viagra’. The drug was approved by the FDA in 1998;
Alcohol abuse is one of the most common causes of impotence. According to this Viagra for treatment erectile dysfunction It is not recommended to use with alcohol.