Which electrolyte should be monitored closely in older adults using stimulant laxatives with diuretics?

Which electrolyte should be monitored closely in older adults using stimulant laxatives with diuretics?

• A. Sodium
• B. Calcium
• C. Magnesium
• D. Potassium

Answer: (D)

Potassium is the key electrolyte to monitor. Stimulant laxatives can cause losses of potassium in the stool, and diuretics increase potassium excretion in the urine. When an older adult uses both, the risk of hypokalemia rises, which can lead to muscle weakness, fatigue, cramps, and, importantly, potentially dangerous heart rhythm changes. So, check serum potassium levels regularly and watch for symptoms, adjusting therapy as needed. While other electrolytes like calcium, magnesium, or sodium can be affected by diuretics or laxatives in other situations, the combination described most directly threatens potassium balance.

Potassium is the key electrolyte to monitor. Stimulant laxatives can cause losses of potassium in the stool, and diuretics increase potassium excretion in the urine. When an older adult uses both, the risk of hypokalemia rises, which can lead to muscle weakness, fatigue, cramps, and, importantly, potentially dangerous heart rhythm changes. So, check serum potassium levels regularly and watch for symptoms, adjusting therapy as needed. While other electrolytes like calcium, magnesium, or sodium can be affected by diuretics or laxatives in other situations, the combination described most directly threatens potassium balance.