In general, vardenafil is more expensive than sildenafil. However, both drugs are available as generic medications, which are ...

But a generic version (and the active ingredient) of this popular medication, sildenafil, is widely available from several drug manufacturers at a fraction of the cost. Here’s more about this ...

You need a prescription to get Viagra in the United States, Canada, and most other countries. Viagra is also available in the generic form sildenafil, which requires a prescription as well.

Used by millions of men in the United States alone, phosphodiesterase type 5 inhibitors such as tadalafil (the active ingredient in Cialis) and sildenafil (the active ingredient in Viagra ...