Yes it is. But, you need to be checked for heart disease before you take it for PVC's, because it can be dangerous, if that is the real problem. There are other drugs that are better for treating PVCs.
Flecainide has been shown to be very effective in the treatment of premature ventricular contractions (PVCs) and is commonly used to treat this condition. Its' profile of safety make it an excellent choice.
Flecainide is an antiarrhythmic medication. It is used for patients that have prolonged periods of PVCS called ventricular tachycardia. Ventricular tachycardia is life threatening. Flecainide should not be used for other incidences of PVC's even if symptomatic. Flecainide should also be started in the hospital because of its proarrhythmic effects.