A nurse is caring for a client with hypertension.Which of the following medications is a vasodilator and is indicated for a hypertensive crisis?

Choice A rationale

Antagonistic reactions occur when one drug interferes with the action of another, decreasing its effectiveness. This is not applicable in this case as aspirin and alcohol together increase the risk of bleeding rather than opposing each other's actions.

Choice B rationale

Synergistic reactions happen when two drugs enhance each other's effects. Aspirin and alcohol together can indeed increase the risk of gastrointestinal bleeding, but this is not referred to as a synergistic reaction.

Choice C rationale

Additive reactions occur when two drugs with similar effects add up to a greater effect. Aspirin and alcohol both increase the risk of bleeding, and their combined effect leads to gastrointestinal bleeding.

Choice D rationale

Neutral reactions imply that the drugs do not interact and have no combined effect, which is incorrect here as the combination of aspirin and alcohol leads to an increased risk of GI bleeding.

Choice A rationale: Furosemide is a loop diuretic used to reduce fluid overload in CHF patients. However, it can exacerbate electrolyte imbalances, particularly hypokalemia. Since the client is already experiencing muscle spasms and has low calcium levels, additional diuretic therapy could worsen these symptoms.

Choice B rationale: Metoprolol is a beta-blocker used to manage hypertension and heart rate in CHF patients. While beneficial for blood pressure control, it does not address the immediate issue of muscle spasms and constipation the client is experiencing.

Choice C rationale: Potassium chloride is indicated to address potential hypokalemia, which may be causing the client's muscle spasms. CHF patients on diuretics often experience low potassium levels, so supplementation is crucial to prevent complications and alleviate symptoms.

Choice D rationale: Acetaminophen is an analgesic and antipyretic, useful for pain and fever management. However, it does not address the client's reported muscle spasms, which are likely related to electrolyte imbalances.