A nurse is providing teaching to a client who has new prescriptions for beclomethasone and albuterol inhalers.
Which of the following instructions should the nurse include in the teaching?

Choice A rationale: Orthostatic hypotension is a common side effect of carbidopa-levodopa due to its vasodilatory effects and impact on the autonomic nervous system. Patients may experience dizziness or lightheadedness when standing up quickly, caused by a drop in blood pressure. Normal blood pressure ranges around 120/80 mm Hg, and sudden decreases can lead to falls, especially in Parkinson’s disease patients who already have balance issues.

Choice B rationale: Wearing-off phenomenon is common with carbidopa-levodopa therapy. This occurs when medication effects diminish before the next dose, causing symptom recurrence such as bradykinesia and tremor. The medication has a relatively short half-life, and patients often report fluctuation in symptom control, especially as disease progresses. Understanding this helps manage expectations and medication timing.

Choice C rationale: High-protein diets can interfere with the absorption of levodopa, as dietary amino acids compete with levodopa for transport across the intestinal mucosa and the blood-brain barrier. Patients are typically advised to moderate protein intake during dosing times to maximize medication effectiveness, rather than increase protein consumption.

Choice D rationale: Levodopa is best absorbed on an empty stomach because food, particularly proteins, delays gastric emptying and competes with levodopa for absorption. Taking the medication 30 minutes before or 1 hour after meals improves bioavailability and symptom control. This knowledge helps optimize medication efficacy.

Choice E rationale: Parkinson’s symptoms usually do not resolve within days of starting carbidopa-levodopa. It often takes weeks to months for optimal symptom control and dose adjustments. Patients should understand that this medication manages symptoms but is not a cure and requires ongoing therapy.

Choice A rationale

Acetaminophen is an analgesic and antipyretic that primarily inhibits prostaglandin synthesis in the central nervous system. It does not significantly interact with clopidogrel, an antiplatelet medication, regarding its antiplatelet activity or bleeding risk. Therefore, reporting acetaminophen use to the provider is generally not a high priority unless liver concerns exist.

Choice B rationale

Valerian is an herbal supplement commonly used for sleep and anxiety. It primarily interacts with gamma-aminobutyric acid (GABA) receptors in the brain. There is no significant scientific evidence or known pharmacokinetic interaction between valerian and clopidogrel that would necessitate reporting its use to the provider due to increased bleeding risk.

Choice C rationale

Vitamin B refers to a group of water-soluble vitamins crucial for various cellular metabolic processes. Generally, vitamin B supplements do not have a known significant interaction with clopidogrel that would alter its antiplatelet effect or increase bleeding risk. Therefore, taking vitamin B is not typically a concern to report.

Choice D rationale

Ginkgo biloba is an herbal supplement known for its antiplatelet properties due to its ability to inhibit platelet-activating factor. Concomitant use with clopidogrel, another potent antiplatelet agent, significantly increases the risk of bleeding. This synergistic effect on platelet aggregation warrants immediate reporting to the provider for assessment and potential dosage adjustments.