The main difference between Cialis and Viagra is how long ... can interact with other medications. Cialis (tadalafil) is a ...

Although Cialis and Viagra both make it easier to get and maintain pleasure, there are a few key differences between these two ... type 5 inhibitors such as tadalafil (the active ingredient ...

Tadalafil is more affordable. It’s usually between $1 and $20 per pill. Cialis and tadalafil use the same active ingredient. The difference in cost is largely due to the brand name’s market ...

Tadalafil operates by inhibiting the action of the enzyme PDE5. This enzyme is responsible for breaking down cyclic guanosine monophosphate (cGMP), a molecule that relaxes smooth muscles and allows ...