A nurse is providing teaching to a client who has angina and a new prescription for nitroglycerin tablets. Which of the following instructions should the nurse include in the teaching?
Repeat up to four doses until pain is relieved.
Store unused tablets at room temperature.
Take two tablets at the onset of pain.
Take the medication two hours prior to exercise.
The Correct Answer is B
Choice A rationale
Repeating up to four doses until pain is relieved is incorrect. The correct instruction is to take one tablet at the onset of pain and repeat every 5 minutes if needed, up to a maximum of three tablets in 15 minutes.
Choice B rationale
Storing unused tablets at room temperature is correct. Nitroglycerin tablets should be stored in their original container at room temperature, away from moisture and heat.
Choice C rationale
Taking two tablets at the onset of pain is incorrect. The correct instruction is to take one tablet at the onset of pain and repeat every 5 minutes if needed, up to a maximum of three tablets in 15 minutes.
Choice D rationale
Taking the medication two hours prior to exercise is incorrect. Nitroglycerin should be taken 5 to 10 minutes before an activity that may cause chest pain.
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Correct Answer is C
Explanation
Choice A rationale
Mannitol is an osmotic diuretic used primarily to reduce intracranial pressure (ICP) and treat cerebral edema. It does not affect thyroxine levels, which are related to thyroid function. Thyroxine levels are regulated by the thyroid gland and are not influenced by mannitol administration.
Choice B rationale
Mannitol is not used to correct atrial flutter. Atrial flutter is a type of arrhythmia that requires specific antiarrhythmic medications or procedures such as cardioversion. Mannitol’s primary action is to increase osmotic pressure in the kidneys, leading to diuresis and reduction of fluid in tissues, including the brain.
Choice C rationale
Mannitol is effective in reducing intracranial pressure by creating an osmotic gradient that draws fluid from the brain tissue into the bloodstream, which is then excreted by the kidneys. This reduction in intracranial pressure is a desired therapeutic outcome when treating conditions like cerebral edema.
Choice D rationale
Mannitol does not increase hemoglobin levels. Hemoglobin levels are influenced by factors such as red blood cell production and destruction, iron levels, and overall health status. Mannitol’s mechanism of action is related to fluid balance and diuresis, not hematopoiesis.
Correct Answer is ["A","B","C","E"]
Explanation
Choice A rationale
Prednisone, a corticosteroid, can cause hypokalemia by increasing renal potassium excretion.
Choice B rationale
Torsemide, a loop diuretic, can lead to hypokalemia by promoting potassium loss through urine.
Choice C rationale
Polystyrene sulfonate is used to treat hyperkalemia, but it can cause hypokalemia as it removes potassium from the body.
Choice D rationale
A client taking spironolactone does not require monitoring for hypokalemia because spironolactone is a potassium-sparing diuretic. It helps the body retain potassium, so it is more likely to cause hyperkalemia (high potassium levels) than hypokalemia.
Choice E rationale
Hydrochlorothiazide, a thiazide diuretic, can cause hypokalemia by increasing potassium excretion in the urine.