The active ingredient in Kirkland Signature Stool Softener is Docusate Sodium 100 mg.
It works as a stimulant-free stool softener (laxative) to gently relieve occasional constipation, generally producing a bowel movement in 12 to 72 hours.

Kirkland Signature Stool Softener 100 mg Soft gels compare to the active ingredient in Colace® Stool Softener.