Usual Adult Dose for Ventricular Tachycardia:
Initial dose:  100 mg orally every 12 hours. Maintenance dose:  May be increased in increments of 50 mg bid every 4 days until efficacy is achieved. Most patients with SUSTAINED VT do not require more than 150 mg every 12 hours (300 mg/day), and the maximum dose recommended is 400 mg/day.
Usual Adult Dose for Atrial Fibrillation:
Initial dose:  50 mg orally every 12 hours. Maintenance dose:  May be increased in increments of 50 mg bid every 4 days until efficacy is achieved.
Usual Adult Dose for Atrial Flutter:
Initial dose:  50 mg orally every 12 hours. Maintenance dose:  May be increased in increments of 50 mg bid every 4 days until efficacy is achieved.
Usual Adult Dose for Wolff-Parkinson-White Syndrome:
Initial dose:  50 mg orally every 12 hours. Maintenance dose:  May be increased in increments of 50 mg bid every 4 days until efficacy is achieved.
Usual Adult Dose for Paroxysmal Supraventricular Tachycardia:
Initial dose:  50 mg orally every 12 hours. Maintenance dose:  May be increased in increments of 50 mg bid every 4 days until efficacy is achieved.
Usual Pediatric Dose for Supraventricular Tachycardia:
less than 1 month:Supraventricular tachycardia: Limited data available: Initial: 2 mg/kg/day orally divided every 12 hours; titrate to clinical response, monitor serum concentration; mean dose required to suppress SVT: 3.35 ± 1.35 mg/kg/day in 17 neonates (n=20 treated neonates; mean PNA: 11.5 days; mean GA: 36.8 weeks; mean birthweight: 2.8 kg); study did not report resultant serum concentrations.1 month or older:Initial: 1 to 3 mg/kg/day orally or 50 to 100 mg/m2/day orally in 3 divided doses; usual: 3 to 6 mg/kg/day or 100 to 150 mg/m2/day in 3 divided doses; up to 8 mg/kg/day or 200 mg/m2/day for uncontrolled patients with subtherapeutic levels; higher doses have been reported, however they may be associated with an increased risk of proarrhythmias; a review of world literature reports the average effective dose to be 4 mg/kg/day or 140 mg/m2/day.
 Detailed Flecainide dosage information
