Which of the following Inhibits theophylline metabolism?: (A) INH, (B) Griseofulvin, (C) Prednisolone, (D) Ciprofloxacin
Answer is D. Plasma concentration of theophylline, warfarin is increased by enzyme inhibitors like ciprofloxacin (also by norfloxacin and pefloxacin) due to inhibition of metabolism: toxicity of these drugs can occur. ESSENTIALS OF MEDICAL PHARMACOLOGY 6TH EDITION KD TRIPATHI Page No:689