Category B
Unknown risk to nursing infants
Adult: Reduce to single initial daily 25mg dose; increase to 25mg b.i.d after 7 days if needed.
Pediatric: N/A
Adult: No adjustments needed, but use caution when increasing dosage
Pediatric: N/A
Encainide
Flecainide
Verapamil
Procainamide
Propafenone
Amiodarone
Ibutilide
Lofexidine