What is a common side effect of administering epinephrine?

• A. Dry mouth
• B. Tachycardia
• C. Hypotension
• D. Bradycardia

Answer: (B)

The administration of epinephrine commonly leads to tachycardia, which is an increase in heart rate. This is primarily due to epinephrine's action as a powerful stimulant of the sympathetic nervous system. When epinephrine is released into the bloodstream or administered during a medical intervention, it binds to adrenergic receptors in the heart, leading to increased cardiac output through elevated heart rate and contractility. This is particularly beneficial in emergencies such as cardiac arrest, where increased perfusion is crucial.

In contrast, other potential side effects related to epinephrine, such as dry mouth or changes in blood pressure, do not typically occur in the same direct manner as tachycardia. Instead of hypotension or bradycardia, which would be counterproductive in emergencies where epinephrine is utilized, tachycardia aligns with the drug's intended effects on enhancing cardiovascular function.