Which laxative is commonly linked to electrolyte disturbances in older adults?

Which laxative is commonly linked to electrolyte disturbances in older adults?

• A. Psyllium
• B. Methylcellulose
• C. Senna
• D. Calcium polycarbophil

Answer: (C)

Stimulant laxatives, such as senna, can cause electrolyte disturbances because they speed up intestinal motility and promote increased fluid and electrolyte secretion into the bowel. In older adults, this can lead to significant losses of potassium and other electrolytes, especially with chronic use, dehydration, or when combined with diuretics or poor oral intake. That’s why senna is commonly linked to electrolyte disturbances in this population. By contrast, bulk-forming laxatives like psyllium, methylcellulose, and calcium polycarbophil work mainly by absorbing water to form stool with relatively minimal electrolyte shifts when used properly, making them safer for maintaining electrolyte balance in older adults. Always use the lowest effective dose and monitor hydration and electrolytes, particularly in those with comorbidities or on other meds that affect fluid balance.

Stimulant laxatives, such as senna, can cause electrolyte disturbances because they speed up intestinal motility and promote increased fluid and electrolyte secretion into the bowel. In older adults, this can lead to significant losses of potassium and other electrolytes, especially with chronic use, dehydration, or when combined with diuretics or poor oral intake. That’s why senna is commonly linked to electrolyte disturbances in this population.

By contrast, bulk-forming laxatives like psyllium, methylcellulose, and calcium polycarbophil work mainly by absorbing water to form stool with relatively minimal electrolyte shifts when used properly, making them safer for maintaining electrolyte balance in older adults. Always use the lowest effective dose and monitor hydration and electrolytes, particularly in those with comorbidities or on other meds that affect fluid balance.