title: Dose- and time-related effect of troleandomycin on methylprednisolone elimination.
abstract: Effects of varying doses of troleandomycin (TAO) on methylprednisolone disposition were examined in five steroid-dependent asthmatic patients. The characteristic reduction in methylprednisolone elimination in the presence of TAO after a 40 mg IV methylprednisolone was also present after methylprednisolone doses as low as 4 mg. In patients receiving continuous TAO on an every-other-day basis, inhibition of methylprednisolone elimination was impaired to a greater extent on the "day on" TAO than on the "day off" TAO Methylprednisolone elimination on the day off TAO was still slower than that before TAO, however, TAO on a multiple-dose schedule resulted in greater reduction of methylprednisolone elimination than after a single TAO dose. These results suggest that TAO induces immediate and continued inhibition of methylprednisolone disposition.
mesh_terms: D001249:Asthma / Q000188:drug therapy*; D004305:Dose-Response Relationship, Drug; D004347:Drug Interactions; D004359:Drug Therapy, Combination; D006801:Humans; D007700:Kinetics; D008775:Methylprednisolone / Q000378:metabolism* / Q000627:therapeutic use; D013997:Time Factors; D014217:Troleandomycin / Q000008:administration & dosage* / Q000627:therapeutic use
chemical_list: D014217:Troleandomycin; D008775:Methylprednisolone