Phillips Milk of Magnesia, Gentle Relief Liquid Magnesium Laxative, Original 4 Fl Oz (Pack Of 12) stimulant-free and cramp-free relief from occasional constipation with Phillips' Milk of Magnesia Laxative. Original Flavor liquid laxative works with the body's natural process to relieve occasional constipation and helps you get back to regular. Formulated with Magnesium Hydroxide, Phillips' Milk of Magnesia offers cramp-free, gentle relief of occasional constipation without the use of harsh stimulants.