Using the original version of milk of magnesia for constipation, the dosage in milliliters varies depending on a person’s age: Adults and children 12 or older can take 30–60 ml. Children ages ...
Dosage guidelines for constipation: For adults and children aged 12 and older, the recommended quantity ranges between 30 mL (2 tablespoons) to 60 mL (4 tablespoons). For children aged 6 to 11 ...