When taken as a laxative, Phillips Milk of Magnesia should produce a bowel movement within 30 minutes to 6 hours. Call your doctor if the condition you are treating with Phillips Milk of Magnesia does not improve, or if it gets worse while using this medicine.

How long do Phillips laxatives take to work?

When will Phillips'^® Stool Softener Liquid Gels begin to work? Phillips'^® Stool Softener Liquid Gels generally provides occasional constipation relief within 12-72 hours after the first dose.

How soon does Phillips Milk of Magnesia work?

Milk of magnesia typically works the first time you take it. You can expect to have a bowel movement within six hours. Sometimes, this can occur in as little as half an hour. The nature and cause of your constipation may impact how long it takes for the treatment to work.