Antitussives are useful in blocking the cough reflex and preserving the energy associated with prolonged, nonproductive coughing. Antitussives are best used with

A) Obstructive sleep apnea (OSA):
Obstructive sleep apnea is a known risk factor for the development of hypertension. During episodes of sleep apnea, breathing repeatedly stops and starts, leading to disruptions in normal sleep patterns and potentially contributing to increased sympathetic nervous system activity, systemic inflammation, and endothelial dysfunction, all of which can elevate blood pressure over time.

B) The choice B was incorrect. While a diet high in potassium is generally associated with lower blood pressure due to its beneficial effects on blood vessel function and fluid balance, it is not considered a risk factor for developing hypertension. In fact, potassium-rich foods like fruits, vegetables, and legumes are often recommended as part of a heart-healthy diet to help manage blood pressure.

C) The choice C was incorrect. A high-density lipoprotein (HDL) level of 70 mg/dL is actually considered beneficial for cardiovascular health. HDL is often referred to as "good" cholesterol because it helps remove LDL (low-density lipoprotein) cholesterol from the bloodstream, reducing the risk of plaque buildup in the arteries. Having a high HDL level is typically associated with a lower risk of cardiovascular disease, including hypertension.

D) The choice D was incorrect. Benazepril is actually an antihypertensive medication, specifically an angiotensin-converting enzyme (ACE) inhibitor. It is used to treat hypertension, not as a risk factor for its development. ACE inhibitors work by relaxing blood vessels, which helps lower blood pressure. While taking certain medications like benazepril may contribute to the management of hypertension, they are not considered risk factors for its development.

E) Cigarette smoking:
Cigarette smoking is a well-established risk factor for the development of hypertension. Smoking cigarettes can lead to the constriction of blood vessels, increased heart rate, and damage to the lining of blood vessels, all of which can elevate blood pressure. Additionally, the chemicals in tobacco smoke can contribute to inflammation and oxidative stress, further exacerbating cardiovascular risk factors. Smoking cessation is an essential component of hypertension management and overall cardiovascular health.

A) Milk:
Milk is not known to interact significantly with verapamil. Therefore, there's no need for the client to avoid consuming milk while taking this medication.

B) Orange juice:
Orange juice does not typically interact with verapamil. However, calcium-containing foods and beverages, including orange juice, may reduce the absorption of verapamil when taken simultaneously. While the interaction is not severe, it's advisable for clients to separate the administration of verapamil from calcium-rich foods and beverages to optimize absorption.

C) Grapefruit juice:
This is the correct answer. Grapefruit juice contains compounds that inhibit the activity of cytochrome P450 enzymes, particularly CYP3A4, which are involved in the metabolism of many medications, including verapamil. Consuming grapefruit juice while taking verapamil can lead to elevated blood levels of the medication, increasing the risk of side effects and toxicity. Therefore, clients should avoid grapefruit juice while on verapamil therapy.

D) Coffee:
Coffee does not typically interact with verapamil. However, caffeine-containing beverages like coffee may exacerbate certain side effects of verapamil, such as dizziness or palpitations, due to their stimulant effects. Clients may be advised to limit caffeine intake or consume coffee in moderation while taking verapamil.