| Item |
Information |
|
Drug Groups
|
approved |
|
Description
|
A class I anti-arrhythmic agent (one that interferes directly with the depolarization of the cardiac membrane and thus serves as a membrane-stabilizing agent) with a depressant action on the heart similar to that of guanidine. It also possesses some anticholinergic and local anesthetic properties. [PubChem] |
| Indication |
For the treatment of documented ventricular arrhythmias, such as sustained ventricular tachycardia, ventricular pre-excitation and cardiac dysrhythmias. It is a Class Ia antiarrhythmic drug. |
| Pharmacology |
Disopyramide is an antiarrhythmic drug indicated for the treatment of documented ventricular arrhythmias, such as sustained ventricular tachycardia that are life-threatening. In man, Disopyramide at therapeutic plasma levels shortens the sinus node recovery time, lengthens the effective refractory period of the atrium, and has a minimal effect on the effective refractory period of the AV node. Little effect has been shown on AV-nodal and His-Purkinje conduction times or QRS duration. However, prolongation of conduction in accessory pathways occurs. |
| Toxicity |
LD50=580 mg/kg in rats |
| Affected Organisms |
| • |
Humans and other mammals |
|
| Biotransformation |
Hepatic |
| Absorption |
Nearly complete |
| Half Life |
6.7 hours (range 4-10 hours) |
| Protein Binding |
50%-65% |
| Elimination |
In healthy men, about 50% of a given dose of disopyramide is excreted in the urine as the unchanged drug, about 20% as the mono-N-dealkylated metabolite and 10% as the other metabolites. |
| External Links |
|