MAGNESIUM HYDROXIDE treats occasional
constipation. It works by increasing the amount of
water your intestine absorbs. This softens the stool, making it easier to have a bowel movement. It also increases pressure, which prompts the muscles in your intestines to move stool. It belongs to a group of medications called laxatives. Get Milk Of Magnesia for as low as $3.38, which is 44% off the average retail price of $6.04 for the most common version, by using a GoodRx coupon.