In theophylline metabolism, drug interactions Occur with all Except:: (A) Cimetidine, (B) Phenobarbitone, (C) Rifamipine, (D) Tetracyclines
Answer is D. Phenobarbitone, rifampin enhance theophylline metabolism Cimetidine inhibits theophylline metabolism ESSENTIALS OF MEDICAL PHARMACOLOGY 7TH EDITION KD TRIPATHI Page No:226,227