A nurse caring for a client who has hypertension and asks the nurse about a prescription for propranolol. The nurse should inform the client that this medication is contraindicated in clients who have a history of which of the following conditions?

Choice A rationale Propranolol is a non-selective beta-adrenergic blocker, meaning it antagonizes both beta (primarily cardiac) and beta (primarily pulmonary and vascular smooth muscle) receptors. Blocking beta receptors in the lungs causes bronchoconstriction, which can significantly exacerbate symptoms in clients with asthma or other reactive airway diseases. Therefore, its use is generally contraindicated in these clients due to the risk of severe respiratory distress, unless a selective beta blocker is absolutely necessary. Choice B rationale Propranolol is sometimes used in the treatment of glaucoma, a condition characterized by increased intraocular pressure. Beta-blockers can lower intraocular pressure by decreasing the production of aqueous humor. While this condition is often treated with topical beta-blockers, systemic propranolol is not typically considered a contraindication, and in some cases, it may offer a therapeutic benefit for the client. Choice C rationale Depression is a potential adverse effect of propranolol and other beta-blockers, possibly due to their central nervous system effects, including reduced norepinephrine and serotonin activity. However, depression is considered a precaution or a potential adverse effect requiring monitoring, not an absolute contraindication, especially if the drug is essential for a life-threatening cardiac condition. Choice D rationale Propranolol is commonly used as a prophylactic treatment for migraine headaches. The mechanism is thought to involve stabilizing vascular tone and inhibiting cerebral vasoconstriction and vasodilation, often by blocking beta-adrenergic receptors and reducing stress-induced sympathetic nervous system activity. Therefore, a history of migraines is an indication for, not a contraindication to, propranolol therapy.