22 - theophylline - drug interactions

THEOPHYLLINE -- DRUG INTERACTIONS

1. drugs which inhibit theophylline metabolism and increase its plasma level :

1. allopurinol
2. cimetidine
3. ciprofloxacin
4. erythromycin
5. OCP

2. drugs which induce theophylline metabolism and decrease its plasma level are :

1. phenytoin
2. phenobarbitone
3. charcoal broiled meat meal
4. rifampicin
5. smoking

3. theophylline enhances the effect of the following drugs:

1. hypoglycemics
2. furosemide
3. digitalis
4. oral anticoagulants
5. sympathomimetics

4. theophylline decreases the effect of :

1. lithium
2. phenytoin