system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Anti arrhythmic drug is
assistant
The correct answer 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