Magnesium citrate is a saline laxative that is thought to work by increasing fluid in the small intestine. It usually results in a bowel movement within 30 minutes to 3 hours.



  • This product is used to clean stool from the intestines before surgery or certain bowel procedures (e.g., colonoscopy, radiography), usually with other products.
  • It may also be used for relief of constipation.
  • However, milder products (e.g., stool softeners, bulk-forming laxatives) should be used whenever possible for constipation.


  • Hypromellose relieves dry and irritated eyes.
  • It is an eye lubricant.
  • It is used to act as an artificial tear.
  • In general this drug is used as a lubricant to treat eye conditions which result in little or no tear production.
  • Benefits of being on this drug can include relief from dry and irritated eyes through replacement with artificial tears.


If this product is used too frequently, it may cause loss of normal bowel function and an inability to have a bowel movement without using the product (laxative dependence). If you notice symptoms of overuse, such as diarrhea, abdominal pain, decreased weight, or weakness, contact your doctor promptly.

Do NOT use magnesium citrate solution if:

  • you are allergic to any ingredient in magnesium citrate solution
  • you are taking aluminum salt (eg, aluminum hydroxide) or quinolones (eg, ciprofloxacin)

Contact your doctor or health care provider right away if any of these apply to you.


Some MEDICINES MAY INTERACT with magnesium citrate solution. Tell your health care provider if you are taking any other medicines, especially any of the following:

  • Aluminum salts (eg, aluminum hydroxide) or anticoagulants (eg, warfarin) because the risk of their side effects may be increased by magnesium citrate solution
  • Bisphosphonates (eg, risedronate), digoxin, penicillamine, quinolone antibiotics (eg, ciprofloxacin), or tetracyclines (eg, doxycycline) because their effectiveness may be decreased by magnesium citrate solution

This may not be a complete list of all interactions that may occur. Ask your health care provider if magnesium citrate solution may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.




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