Magnesium Citrate is classified as which type of laxative?

• A. Osmotic laxative
• B. Stimulant laxative
• C. Saline laxative
• D. Bulk-forming laxative

Answer: (C)

Magnesium citrate is classified as a saline laxative because it is a mineral salt that stays in the intestinal lumen and draws water into the bowel. When you take it, the magnesium salts are not fully absorbed, creating an osmotic gradient that pulls water into the colon. This higher water content softens and expands the stool, increasing stool volume and speeding evacuation. This mechanism distinguishes saline laxatives from bulk-forming laxatives (which add fiber to increase stool bulk), stimulant laxatives (which stimulate gut nerves to raise motility), and other osmotic laxatives that may use non-saline osmotic agents. Remember to stay hydrated and be aware of potential electrolyte effects, especially in people with kidney issues.