Undersøgelser har bekræftet, at tadalafil ikke inhiberer eller inducerer CYP450- isoformerne CYP3A4, CYP1A2, CYP2D6, CYP2E1, CYP2C9 og CYP2C19.
Studies have confirmed that tadalafil does not inhibit or induce CYP450 isoforms, including CYP3A4, CYP1A2, CYP2D6, CYP2E1, CYP2C9 and CYP2C19.