Drugs which increase the level of theophylline include :
High-Yield Explanation
Drugs which inhibit theophylline metabolism and increase its plasma level are:
Erythromycin
Ciprofloxacin
Cimetidine
OCP
Allopurinol
Agents which induce theophylline metabolism and decrease its plasma level are :
Smoking
Phenytoin
Rifampicin
Phenobarbitone