qs Flashcards
1
Q
which drugs decrease warfarin action? how?
A
CPY450 enzyme inducers ; decreases INR
Carbamazepine
Rifampicin
Alcohol
Phenytoin
2
Q
which drugs increase warfarin action? how?
A
CPY450 enzyme inhibitors ; increase INR
Metronidazole Erythromycin Azole antifungals Nsaids Tetracyclines
3
Q
when should INR be checked before oral surgery?
A
for patients on warfarin
72 hours before dental surgery
