Magnesium Citrate
Magnesium citrate is used to treat occasional constipation on a short-term basis. Magnesium citrate is in a class of medications called saline laxatives. It works by causing water to be retained with the stool. This increases the number of bowel movements and softens the stool so it is easier to pass.
🔔 How should this medicine be used?
Magnesium citrate comes as a powder to mix with a liquid and as a solution (liquid) to take by mouth. It is usually taken as a single daily dose or to divide the dose into two or more parts over one day. Do not take magnesium citrate for more than 1 week, unless your doctor tells you to do so. Magnesium citrate usually causes a bowel movement within 30 minutes to 6 hours after taking it. Follow the directions on your product label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take magnesium citrate exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.
Take the liquid product with a full glass (8 ounces [240 milliliters]) of liquid.
To prepare the powder for solution, mix the powder with 10 ounces (296 milliliters) of cold water or other liquids and shake or stir the mixture thoroughly. If needed, refrigerate the solution after mixing it, but mix it again before use. If the oral solution mixture is not used within 36 hours after preparation, dispose of the mixture. Be sure to ask your pharmacist or doctor if you have any questions about how to mix or take this medication.
Ask your pharmacist or doctor for a copy of the manufacturer’s information for the patient.
🔔 Other uses for this medicine
Magnesium citrate is also used to empty the colon (large intestine, bowel) before a colonoscopy (examination of the inside of the colon to check for colon cancer and other abnormalities) or certain medical procedures.
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This medication may be prescribed for other uses; ask your doctor or pharmacist for more information.
🔔 What special precautions should I follow?
Before taking magnesium citrate,
- tell your doctor and pharmacist if you are allergic to magnesium citrate, any other medications, or any of the ingredients in magnesium citrate preparations. Ask your pharmacist or check the product label for a list of the ingredients.
- tell your doctor and pharmacist what other prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking or plan to take. Your doctor may need to change the doses of your medications or monitor you carefully for side effects.
- if you are taking other medications, take them at least 2 hours before or 2 hours after taking magnesium citrate.
- tell your doctor if you have stomach pain, nausea, vomiting, or a sudden change of bowel habits lasting more than 2 weeks. Tell your doctor if you are on a magnesium or sodium-restricted diet. Also, tell your doctor if you have or have ever had kidney disease.
- tell your doctor if you are pregnant, plan to become pregnant, or are breastfeeding. If you become pregnant while taking magnesium citrate, call your doctor.
🔔 What special dietary instructions should I follow?
Unless your doctor tells you otherwise, continue your normal diet.