Cases of life-threatening interactions have been reported for disopyramide when given with clarithromycin and erythromycin indicating that coadministration of disopyramide with inhibitors of cytochrome P450 3A4 could result in potentially fatal interaction.
Source: FDA drug label - disopyramide phosphate
Drug Interactions If phenytoin or other hepatic enzyme inducers are taken concurrently with disopyramide phosphate, lower plasma levels of disopyramide may occur. Monitoring of disopyramide plasma levels is recommended in such concurrent use to avoid ineffective therapy. Other antiarrhythmic drugs (e.g., quinidine, procainamide, lidocaine, propranolol) have occasionally been used concurrently with disopyramide phosphate.
Source: FDA drug label - disopyramide phosphate
Although potent inhibitors of cytochrome P450 3A4 (e.g., ketoconazole) have not been studied clinically, in vitro studies have shown that erythromycin and oleandomycin inhibit the metabolism of disopyramide. Cases of life-threatening interactions have been reported for disopyramide when given with clarithromycin and erythromycin indicating that coadministration of disopyramide with inhibitors of cytochrome P450 3A4 could result in potentially fatal interaction.
Source: FDA drug label - disopyramide phosphate
In healthy subjects, no significant drug-drug interaction was observed when disopyramide phosphate was coadministered with either propranolol or diazepam.
Source: FDA drug label - disopyramide phosphate
Although potent inhibitors of cytochrome P450 3A4 (e.g., ketoconazole) have not been studied clinically, in vitro studies have shown that erythromycin and oleandomycin inhibit the metabolism of disopyramide.
Source: FDA drug label - disopyramide phosphate
Although potent inhibitors of cytochrome P450 3A4 (e.g., ketoconazole) have not been studied clinically, in vitro studies have shown that erythromycin and oleandomycin inhibit the metabolism of disopyramide.
Source: FDA drug label - disopyramide phosphate
Other antiarrhythmic drugs (e.g., quinidine, procainamide, lidocaine, propranolol) have occasionally been used concurrently with disopyramide phosphate.
Source: FDA drug label - disopyramide phosphate
Other antiarrhythmic drugs (e.g., quinidine, procainamide, lidocaine, propranolol) have occasionally been used concurrently with disopyramide phosphate. In healthy subjects, no significant drug-drug interaction was observed when disopyramide phosphate was coadministered with either propranolol or diazepam.
Source: FDA drug label - disopyramide phosphate