Hawaii Veterinary State Licensing Practice Exam - Practice Test & Study Guide

The correct medication for treating tachycardia caused by bufo toxin is propranolol. Bufo toxin is derived from certain toads, such as the cane toad, and can induce various cardiovascular effects, including increased heart rate, also known as tachycardia. Propranolol is a beta-blocker that directly targets the beta-adrenergic receptors in the heart, effectively reducing heart rate and controlling the effects of excessive catecholamines, which can be elevated due to the toxin.

This medication not only helps to stabilize heart rhythm but also alleviates the potential for more serious complications arising from tachycardia. It is important for veterinary professionals to recognize the specific effects of bufo toxin to choose the appropriate treatment, and propranolol is specifically indicated for managing tachycardic conditions caused by this substance.

Other medications listed may not adequately address the specific cardiovascular effects associated with bufo toxin. Some may address anxiety, pain, or conditions generally unrelated to the direct effects of bufo toxin on heart rate, which is why they are not suitable choices in this particular case.