Table 1.

Drugs and Drug Classes Triggering Stealth Alerts*

Allopurinol
Amiodarone and dronedarone
Anti-androgens (e.g., flutamide)
Antibacterial agents (including cephalosporins and other classes)
Antifungal agents (e.g., ketoconazole)
Barbiturates (e.g., Phenobarbital)
Fibric acid derivatives (e.g., fenofibrate)
Glucocorticoids (e.g., prednisone)
HMG-CoA reductase inhibitors (statins)
Phenytoin and chemically related anti-epileptic agents (e.g., fosphenytoin)
Protease inhibitors (e.g., ritonavir)
Tamoxifen

*The prescription of any of these medications or classes of medications in a patient receiving warfarin triggered the stealth alert