Question

a nurse is preparing to administer phenylephrine to a client. the nurse should identify that that which of the following manifestations is an adverse effect of this medication?

• hypertension
• sleepiness
• hypotension
• constipation

Explanation:

Phenylephrine is a vasoconstrictor (alpha - adrenergic agonist). Its mechanism of action involves constricting blood vessels. When blood vessels constrict, peripheral resistance increases, which leads to an increase in blood pressure. So, hypertension is a known adverse effect of phenylephrine. Sleepiness is not a typical adverse effect of this drug; in fact, it can sometimes cause restlessness. Hypotension is the opposite of what this drug causes as it is a vasoconstrictor. Constipation is also not a common adverse effect associated with phenylephrine.

Answer:

A. Hypertension