cimetidine inhibits the metabolism of all the following drugs except:
cimetidine is a potent inhibitor of.microsomal enzymes.it prolongs the half life of warfarin, theophyllin ,phenytoin,oral hypoglycemic agents ,alcohol and benzidiazepines.(ref KDT 6/e p630)
phenytoin
warfarin
ketoconazole
diazepam
Gastrointestinal tract