Revatio® is used to treat a scarce condition called pulmonary arterial hypertension (PAH). Viagra® and generic Viagra® shouldn't be utilized with Revatio® or with other PAH methods made up of sildenafil or any other PDE5 inhibitors (such as Adcirca [tadalafil])are allergic to sildenafil, as contained in Viagra® and Revatio, or any in the subst