A patient is diagnosed with hypokalemia. After reviewing the patient’s current medications, which drug should the nurse consider that might have contributed to the patient’s health problem?
A.
Narcotic.
B.
Thiazide diuretic.
C.
Corticosteroid.
D.
Muscle relaxer.
The Correct answer and Explanation is:
The correct answer is B. Thiazide diuretic.
Explanation:
Hypokalemia, defined as a serum potassium level below 3.5 mEq/L, can be caused by several factors, including certain medications. Among the options provided, thiazide diuretics are the most significant contributors to the development of hypokalemia.
Thiazide Diuretics: These medications, such as hydrochlorothiazide, are commonly used to treat hypertension and edema. They work by inhibiting sodium reabsorption in the distal convoluted tubule of the nephron, which increases the excretion of sodium and water. However, this mechanism also leads to the increased excretion of potassium, as potassium is lost along with sodium in the urine. As a result, patients taking thiazide diuretics are at risk for developing hypokalemia, especially if they have inadequate dietary potassium intake or are concurrently using other diuretics.
Other Medications:
- Narcotics (Option A) generally do not affect potassium levels directly, although severe constipation from narcotics can sometimes lead to secondary complications.
- Corticosteroids (Option C) can lead to hyperkalemia rather than hypokalemia in some cases, but they can also cause potassium loss through increased renal excretion. However, their primary association is not with hypokalemia, making them less of a concern compared to thiazide diuretics.
- Muscle Relaxers (Option D) do not typically affect potassium levels directly; however, certain muscle relaxants may have other systemic effects.
In clinical practice, nurses should monitor potassium levels in patients on thiazide diuretics and educate them about dietary potassium sources to mitigate the risk of hypokalemia. Regular laboratory checks can also help in managing potassium levels effectively.