Cialis interactions and side effects
Tadalafil is metabolised by cytochrome CYP3A4 and its toxicity may be increased in patients undergoing therapy with other substrates or inhibitors of this enzyme, such as macrolide and imidazole antibiotics, statins, antiretroviral drugs.Caution is advised when prescribing 시알리스 구매 to patients who are using potent CYP3A4 inhibitors (ritonavir, saquinavir, ketoconazole, itraconazole, grapefruit juice, clarithromycin and erythromycin) as increased exposure to tadalafil has been observed when the medicines are given in combination. A CYP3A4 inducer, such as rifampicin, reduced the distribution of tadalafil by 90%, possibly reducing its efficacy. Other CYP3A4 inducers, such as phenobarbital, phenytoin and carbamazepine, may decrease the plasma concentrations of tadalafil. Tadalafil does not inhibit or induce CYP450 isoenzymes, including CYP3A4, CYP1A2, CYP2D6, CYP2E1, CYP2C9 and CYP2C19. The role of protein carriers (such as, for example, p-glycoprotein) in the distri...