The cyclosporine is widely used as an immuno-suppressive agent in association with others drugs. Its narrow therapeutic range requires frequent monitoring. We suggest a literature review of suspected or confirmed drug interactions. The classification is presented as: absorption interactions; pharmacokinetic interactions in antiinfectious, anticonvulsants, cardiovascular drugs, H2 antagonists agents, hormonotherapy; pharmacodynamic interactions associated to increased cyclosporine nephrotoxicity.