Experience fast, comfortable relief from occasional constipation and irregularity in a cherry-flavored liquid with Dulcolax Stimulant Free Liquid Laxative. Formulated with active ingredient magnesium hydroxide, this gentle laxative works naturally with your body to draw water into the colon to help soften hard, dry stools .. without cramping or urgency. Best of all, Dulcolax Cherry Liquid gives you relief in as little as 30 minutes. How's that for fast and effective? Works in 30 minutes to 6 hours.