蓖麻油

概览

Castor oil is an ingredient used in a variety of natural health products.

作用机制

Castor oil is a mix of triglycerides consisting of mainly ricinolein, linoleic acid, oleic acid, palmitic acid, stearic acid, dihydroxystearic acid, and traces of other fatty acids . The main pharmacodynamic effects of castor oil are mediated by ricinoleic acid, a hydroxylated fatty acid released from castor oil by intestinal lipases . It was believed that ricinoleic acid acts as an anionic surfactant that reduces net absorption of fluid and electrolytes, and stimulates intestinal peristalsis . However, a recent study suggests that ricinoleic acid interacts with EP3 prostanoid receptors expressed on intestinal and uterine smooth muscles. Via activating EP3 prostanoid receptors on intestinal and uterine smooth muscle cells, ricinoleic acid promotes laxation and uterus contraction, respectively . EP3 receptor act as the major prostanoid receptor in the intestine mediating propulsive effects on gut motility, and activation of EP3 receptors has been demonstrated to evoke contraction of uterine smooth muscle .

适应症

Indicated for over-the-counter use as a laxative for oral use and as a soothing agent for topical use on skin and hair.

• Constipation
• Occasional Constipation