Phillips' Milk of Magnesia is an over-the-counter liquid medicine commonly used for digestive discomfort. It contains magnesium hydroxide, which helps draw water into the intestines to soften stool and support bowel movements. The product can also neutralize excess stomach acid, which may help reduce symptoms such as heartburn, acid indigestion, and sour stomach. It is generally used for short-term relief of occasional constipation and digestive discomfort. However, like many medications, it may cause side effects in some people and should be used according to instructions. Understanding how this product works can help individuals make informed decisions about digestive health.