Which enzyme is inhibited by aminophylline?: (A) Monoamine oxidase, (B) Alcohol dehydrogenase, (C) Phosphodiesterase, (D) Cytochrome
Answer is C. Aminophylline (Methylxanthine) inhibits phosphodiesterase which degrades cyclic neucleotides intracellularly. Ref: Essentials of Pharmacology By K D Tripathi, 5th Edtion, Page 202.