Country: United States
Language: English
Source: NLM (National Library of Medicine)
DISOPYRAMIDE PHOSPHATE (UNII: N6BOM1935W) (DISOPYRAMIDE - UNII:GFO928U8MQ)
Golden State Medical Supply Inc.
ORAL
PRESCRIPTION DRUG
Disopyramide phosphate capsules are indicated for the treatment of documented ventricular arrhythmias, such as sustained ventricular tachycardia, that, in the judgment of the physician, are life-threatening. Because of the proarrhythmic effects of disopyramide, its use with lesser arrhythmias is generally not recommended. Treatment of patients with asymptomatic ventricular premature contractions should be avoided. Initiation of disopyramide treatment, as with other antiarrhythmic agents used to treat life-threatening arrhythmias, should be carried out in the hospital. Antiarrhythmic drugs have not been shown to enhance survival in patients with ventricular arrhythmias. Disopyramide phosphate capsules are contraindicated in the presence of cardiogenic shock, preexisting second- or third-degree AV block (if no pacemaker is present), congenital Q-T prolongation, or known hypersensitivity to the drug.
Disopyramide Phosphate Capsules (equivalent to 100 mg disopyramide base) are opaque orange capsules imprinted with m on one side and 095 on the other. Supplied in bottles of 100. Disopyramide Phosphate Capsules (equivalent to 150 mg disopyramide base) are opaque brown capsules imprinted with m on one side and 096 on the other. Supplied in bottles of 100. Dispense in a well-closed container with child-resistant closure. Store at 20° to 25°C (68° to 77°F) [See USP Controlled Room Temperature].
Abbreviated New Drug Application
DISOPYRAMIDE PHOSPHATE- DISOPYRAMIDE PHOSPHATE CAPSULE GOLDEN STATE MEDICAL SUPPLY INC. ---------- DISOPYRAMIDE PHOSPHATE CAPSULES, USP RX ONLY REVISED: DECEMBER 2017 DESCRIPTION Disopyramide phosphate is an antiarrhythmic drug available for oral administration in immediate-release capsules containing 100 mg or 150 mg of disopyramide base, present as the phosphate. The base content of the phosphate salt is 77.6%. The structural formula of disopyramide phosphate is: C H N O·H PO M.W. 437.47 (±)-α-[2-(Diisopropylamino)ethyl]-α-phenyl-2-pyridineacetamide phosphate (1:1). Disopyramide phosphate is freely soluble in water, and the free base (pKa 10.4) has an aqueous solubility of 1 mg/mL. The chloroform: water partition coefficient of the base is 3.1 at pH 7.2. Disopyramide phosphate is a racemic mixture of _d_- and _l_-isomers. This drug is not chemically related to other antiarrhythmic drugs. Disopyramide phosphate capsules (equivalent to 100 mg Disopyramide Base) and Disopyramide phosphate capsules (equivalent to 150 mg Disopyramide Base) contain the following inactive ingredients: magnesium stearate, microcrystalline cellulose and sodium lauryl sulfate. The capsule shells contain gelatin, methylparaben, propylparaben, and titanium dioxide. The 100 mg capsule shell also contains D&C Red No. 28, D&C Yellow No. 10, FD&C Blue No. 1 and FD&C Red No. 40. The 150 mg capsule shell also contains black iron oxide and red iron oxide. CLINICAL PHARMACOLOGY MECHANISMS OF ACTION Disopyramide phosphate is a Type 1 antiarrhythmic drug (i.e., similar to procainamide and quinidine). In _animal studies_ disopyramide decreases the rate of diastolic depolarization (phase 4) in cells with augmented automaticity, decreases the upstroke velocity (phase 0) and increases the action potential 21 29 3 3 4 duration of normal cardiac cells, decreases the disparity in refractoriness between infarcted and adjacent normally perfused myocardium, and has no effect on alpha- or beta-adrenergic receptors. ELECTROPHYS IOLOGY In man, disopyramide a Read the complete document