Anti arrhythmic drug is
Refer kDT 7/e p 529 Phentolamine is a synthetic imidazoline with alpha-adrenergic antagonist activity. As a competitive alpha-adrenergic antagonist, phentolamine binds to alpha-1 and alpha-2 receptors, resulting in a decrease in peripheral vascular resistance and vasodilatation. Phenobarbital belongs to a class of drugs known as barbiturate anticonvulsants/hypnotics. Pentamidine is an antimicrobial medication used to treat African trypanosomiasis, leishmaniasis, babesiosis, and to prevent and treat pneumocystis pneumonia in people with poor immune function
Phentolamine
Phenobarbitone
Procainamide
Pentamidine
Cardiovascular system