Esmolol is a beta 1-selective (cardioselective) adrenergic receptor blocking agent...learn more »

Digoxin is derived from the leaves of a digitalis plant. Digoxin helps make the heart beat stronger and with a more regular rhythm...learn more »

Diltiazem is in a group of drugs called calcium channel blockers. It works by relaxing the muscles of your heart and blood vessels...learn more »