Give examples of Drug-Drug interactions.. Warfarin. Insulin. Heparin. Spironolactone. Phenobarbital

Give examples of Drug-Drug interactions?
Warfarin--------- ----Aspirin
Insulin --------------- B-Blocker
Heparin -------- -----Aspirin & Ampicillin
Warfarin -------- ----Vit. K
Warfarin ------------ Phenobarbital
Spironolactone ----- Digoxin
ACEIS --------------- K-Sparing diuretics