A nurse is providing teaching about nifedipine for a client who is at 34 weeks of gestation and has gestational hypertension. For which of the following adverse effects should the nurse instruct the client to notify the provider?

Choice A rationale Tinnitus, a ringing sensation in the ears, is not a commonly reported adverse effect of nifedipine. Nifedipine is a calcium channel blocker primarily used to relax smooth muscle, including in the uterus and blood vessels. Its common side effects are typically related to its vasodilatory action rather than ototoxicity. Choice B rationale Irregular heartbeat, specifically palpitations or tachycardia, is an important adverse effect of nifedipine that warrants notifying the provider. Nifedipine can cause reflex tachycardia due to its vasodilatory effects, which can be significant in some individuals. Monitoring for and reporting changes in cardiac rhythm is crucial to ensure patient safety and appropriate management. Choice C rationale Hair loss, or alopecia, is not a recognized or common adverse effect associated with nifedipine therapy. The mechanism of action of nifedipine does not typically interfere with hair follicle function or growth cycles. Adverse drug reactions associated with nifedipine are generally cardiovascular or gastrointestinal in nature. Choice D rationale Increased salivation is not a typical or expected adverse effect of nifedipine. Common side effects of nifedipine often include dizziness, headache, flushing, peripheral edema, and nausea, primarily due to its vasodilatory properties. Changes in salivary gland function are not commonly implicated with nifedipine use.