Loulergue, Pierre Interaction involving tadalafil and CYP3A4 inhibition by ritonavir. [electronic resource] - Scandinavian journal of infectious diseases Mar 2011 - 239-40 p. digital Publication Type: Case Reports; Letter ISSN: 1651-1980 Standard No.: 10.3109/00365548.2010.526139 doi Subjects--Topical Terms: AdultAnti-HIV Agents--administration & dosageAntiretroviral Therapy, Highly Active--adverse effectsCarbolines--administration & dosageCytochrome P-450 CYP3A--deficiencyCytochrome P-450 CYP3A InhibitorsDrug InteractionsHIV Infections--drug therapyHumansMalePriapism--chemically inducedRitonavir--administration & dosageTadalafil