 Some acecainide can convert to procainamide.The deacetylation clearance of acecainide is 0.39 L/h compare to a total NAPA clearance of 1.38 L/h, indicating that 2.8% of NAPA was converted to procainamide, 0.3% was desethylated, and 10.3% convert to unidentified metabolites, with 86.6% excreted unchanged.Following oral administration, 59 to 87% of a dose of acecainide is excreted unchanged in the urine.