What side effect should a client be aware of when prescribed diphenhydramine?

• Hypertension: Benazepril is an angiotensin-converting enzyme (ACE) inhibitor used to lower blood pressure by blocking the conversion of angiotensin I to angiotensin II. This results in vasodilation and reduced aldosterone secretion, which lowers systemic vascular resistance. It is commonly prescribed as first-line or adjunct therapy for chronic hypertension.

• Hyperkalemia: ACE inhibitors decrease aldosterone secretion, leading to reduced potassium excretion by the kidneys. In clients with existing hyperkalemia, benazepril can further elevate potassium levels, increasing the risk of dangerous cardiac dysrhythmias. Serum potassium must be monitored closely in clients receiving this medication.

• Breastfeeding: Benazepril can be excreted into breast milk and may affect neonatal renal function and blood pressure regulation. Infants exposed to ACE inhibitors are at risk for hypotension and renal impairment. Because of these potential effects, benazepril is contraindicated during breastfeeding.

A. A client with benign prostatic hyperplasia: Terazosin is an alpha-1 adrenergic blocker that relaxes smooth muscle in the prostate and bladder neck, improving urine flow and reducing symptoms of BPH such as urinary hesitancy and incomplete bladder emptying.

B. A client with a history of syncope: Terazosin can cause orthostatic hypotension, especially with the first dose, increasing the risk of dizziness and fainting. Administering it to a client prone to syncope could exacerbate this risk.

C. A client with fluid volume deficit: Hypovolemia can intensify the blood pressure–lowering effects of terazosin, increasing the likelihood of symptomatic hypotension and falls. Careful assessment and correction of fluid status are necessary before administration.

D. A client with hypotension: Terazosin lowers blood pressure by vasodilation. Administering it to a client who already has hypotension could cause severe hypotensive episodes, dizziness, or shock.