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You are here: Home » eGM Resources » Health Information & Resources Portal|Home » RX Drug List (listed alphabetically) » Drug Reference (P's) » Procainamide



Positive ANA Titer: The prolonged administration of procainamide often leads in the development of a positive anti-nuclear antibody (ANA) test, with or without symptoms of a lupus erythematosus-like syndrome. If a positive ANA titer develops, the benefits versus risks of continued procainamide therapy should be assessed.

Procainamide hydrochloride, a Group 1A cardiac antiarrhythmic drug, is p-amino-N-[2-(diethylamino) ethyl]-benzamide monohydrochloride, molecular weight 271.79.

Procainamide Hydrochloride Extended-release Tablets meet USP Drug Release Dissolution Test 5

Procainamide Hydrochloride differs from procaine which is the p-aminobenzoyl ester of 2-(diethylamino)-ethenol. Procainamide as the free base has a pKa of 9.23; the monohydrochloride is very soluble in water. Procainamide Hydrochloride Extended-release Tablets, USP is available for oral administration as pink, scored, film-coated tablets containing 500 mg Procainamide hydrochloride, as light orange to tan, scored, film-coated tablets containing 750 mg procainamide hydrochloride, and as red scored film-coated tablets containing 1000 mg procainamide hydrochloride.

All strengths of Procainamide Hydrochloride contain calcium silicate, carnauba wax, NF; diethyl phthalate, NF; dimethyl Polysiloxane fluid; ethylcellulose, NF; hydroxypropyl methylcellulose 2910, USP; magnesium stearate NF; and vanillin, NF. The individual strengths contain additional ingredients as follows:

500 mg: D&C Red No. 30, aluminum lake; hydroxypropyl methylcellulose, USP; Polyethylene glycol, NF; polysorbate 80, NF; and titanium dioxide, USP.

750 mg: D&C Yellow No. 10, aluminum lake; FD&C Yellow. No 6, aluminum lake: hydroxypropyl methylcellulose, USP; polyethylene glycol. NF; polysorbate 80, NF; and titanium dioxide, USP.

1000 mg: FD&C Red No. 40, aluminum lake; polyethylene glycol, NF; Polysorbate 80, NF; and titanium dioxide, USP.

Procainamide Hydrochloride Extended-release Tablets contain a tablet matrix, designed for the controlled release of the drug through the gastrointestinal tract. The extended wax tablet Matrix, which is not absorbed, may be detected in the stool.

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