Which combination is associated with potassium depletion risk?

Which combination is associated with potassium depletion risk?

• A. Senna with diuretics
• B. Senna with antibiotics
• C. Senna with antacids
• D. Senna with antidiarrheals

Answer: (A)

Potassium depletion risk rises when a stimulant laxative is used with a diuretic because both increase potassium loss, but in different ways. Senna speeds up intestinal transit and causes more potassium to be lost in the stool. Diuretics, especially loop and thiazide types, boost renal potassium excretion. Together, they can lead to significant hypokalemia, which can cause muscle weakness, fatigue, and cardiac rhythm problems, especially in older adults who may have other risk factors. Other combinations don’t typically carry the same clear risk: antibiotics can cause diarrhea but don’t inherently drive potassium loss; antacids don’t promote potassium depletion; and antidiarrheals reduce stool movement and usually don’t increase potassium loss.

Potassium depletion risk rises when a stimulant laxative is used with a diuretic because both increase potassium loss, but in different ways. Senna speeds up intestinal transit and causes more potassium to be lost in the stool. Diuretics, especially loop and thiazide types, boost renal potassium excretion. Together, they can lead to significant hypokalemia, which can cause muscle weakness, fatigue, and cardiac rhythm problems, especially in older adults who may have other risk factors.

Other combinations don’t typically carry the same clear risk: antibiotics can cause diarrhea but don’t inherently drive potassium loss; antacids don’t promote potassium depletion; and antidiarrheals reduce stool movement and usually don’t increase potassium loss.