Why can sorbitol from liquid medications cause diarrhea in enterally fed patients even if sorbitol is not an ingredient of the enteral formula?

Why can sorbitol from liquid medications cause diarrhea in enterally fed patients even if sorbitol is not an ingredient of the enteral formula?

• A. Sorbitol is absorbed slowly in the stomach.
• B. The cumulative daily dose of sorbitol from liquid medications can equal purgative dosages.
• C. Sorbitol interacts with other nutrients to slow absorption.
• D. Sorbitol increases water absorption in the colon.

Answer: (B)

Sorbitol acts as an osmotic laxative. When enough sorbitol is ingested, it remains unabsorbed in the small intestine and draws water into the intestinal lumen, increasing stool liquidity and accelerating transit. In enterally fed patients, the formula itself may be sorbitol-free, but many liquid medications contain sorbitol as a sweetener or excipient. The total daily sorbitol from these medications can accumulate to a purgative, laxative dose, reaching the colon and causing diarrhea even though the enteral formula does not contain sorbitol. The key idea is the cumulative exposure to sorbitol from meds reaching a dosage that induces osmotic diarrhea.

Sorbitol acts as an osmotic laxative. When enough sorbitol is ingested, it remains unabsorbed in the small intestine and draws water into the intestinal lumen, increasing stool liquidity and accelerating transit. In enterally fed patients, the formula itself may be sorbitol-free, but many liquid medications contain sorbitol as a sweetener or excipient. The total daily sorbitol from these medications can accumulate to a purgative, laxative dose, reaching the colon and causing diarrhea even though the enteral formula does not contain sorbitol. The key idea is the cumulative exposure to sorbitol from meds reaching a dosage that induces osmotic diarrhea.