A patient taking which of the following medications concurrently would be at risk of developing hyperkalemia?

Rationale

Spironolactone and potassium can lead to hyperkalemia when taken together.

Spironolactone is a potassium-sparing diuretic that reduces potassium excretion in the urine, while potassium supplementation increases serum potassium levels. When these two are combined, the risk of hyperkalemia, or elevated potassium levels in the blood, significantly increases.

A (Furosemide and amlodipine) YOUR ANSWER

Furosemide is a loop diuretic that typically promotes potassium excretion, while amlodipine is a calcium channel blocker that does not affect potassium levels. Therefore, this combination is unlikely to cause hyperkalemia as furosemide counters the risk by facilitating potassium loss.

B (Amlodipine and spironolactone) YOUR ANSWER

While spironolactone can lead to increased potassium levels, amlodipine does not influence potassium levels. However, since amlodipine is not a potassium-retaining agent, this combination does not carry the same risk of hyperkalemia as spironolactone with potassium.

C (Potassium and furosemide) YOUR ANSWER

Furosemide promotes potassium excretion, which would counteract the effects of potassium supplementation. Therefore, while potassium intake is increased, the furosemide would help to mitigate any potential rise in serum potassium levels, making hyperkalemia less likely.

D (Spironolactone and potassium) CORRECT

As previously mentioned, spironolactone reduces potassium excretion due to its potassium-sparing effects. When taken concurrently with potassium supplements, the risk of hyperkalemia is significantly heightened due to the combination of increased potassium retention and additional potassium intake.

Conclusion

The combination of spironolactone and potassium presents a substantial risk for hyperkalemia, as both factors contribute to elevated potassium levels. Other combinations, like furosemide with potassium or amlodipine with spironolactone, do not pose the same risk due to their respective effects on potassium levels. Understanding these interactions is crucial for managing patients' medications effectively to prevent hyperkalemia.

A patient taking which of the following medications concurrently would be at risk of developing hyperkalemia?

Spironolactone and potassium can lead to hyperkalemia when taken together.

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