Magnesium citrate is a salt of magnesium and citric acid. It is commonly used as a laxative to treat constipation and to clear the intestines before surgical or diagnostic procedures.

Additionally, it can be used as a dietary supplement to ensure adequate magnesium intake, which is essential for various bodily functions, including muscle and nerve function, energy production, and bone health.

What Are the Uses of Magnesium Citrate?

Magnesium Citrate helps with digestion, muscle function, and more-making it useful both as a medicine and as a dietary supplement.

  • Laxative: To relieve occasional constipation by drawing water into the intestines, which helps to soften the stool and promote bowel movements.
  • Bowel Preparation: To clear the intestines before surgical or diagnostic procedures, such as a colonoscopy.
  • Magnesium Supplement: To treat or prevent magnesium deficiency, ensuring adequate magnesium levels for proper muscle and nerve function, energy production, and bone health.
  • Muscle Cramps and Spasms: To alleviate muscle cramps and spasms, particularly those associated with magnesium deficiency.

How Does Magnesium Citrate Work (Mechanism of Action)?

This medicine works by increasing water in the intestines and replenishing magnesium levels, which helps in smooth muscle movement and nerve function.

  • As a laxative, it draws water into the intestines to promote bowel movements.
  • As a supplement, it provides magnesium for healthy nerve signals, muscle contraction, and energy production.

Magnesium Citrate Dosage

  • Follow the prescribed dosage and doctor's advice for the safe use of Magnesium citrate.
  • Magnesium citrate is typically taken as a single daily dose or divided into multiple doses over the day.
  • It should not be used for more than one week without a doctor's approval. It usually induces bowel movements within 30 minutes to 6 hours.
  • Follow prescription instructions carefully. Mix the powder with 10 ounces of liquid and shake well before use.
  • Store solution in the fridge if needed and discard after 36 hours.

The dosage of magnesium citrate can vary depending on the specific purpose for which it's being used and individual factors such as age, health status, and any underlying medical conditions. It's best to follow the instructions provided by the doctor.

  • Liquid: 290 mg/5 ml
  • Tablet: 100 mg

What Should I Do If I Miss a Dose of Magnesium Citrate?

Missing a dose isn't usually serious, but continue as directed for consistent results.

  • If you miss a dose, take it when you remember unless it's near the next dose time.
  • Do not double the dose to make up for a missed one.

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What Happens If I Overdose on Magnesium Citrate?

Taking too much can be harmful and may require emergency medical care. Symptoms of overdose include:

  • Diarrhea
  • Weak or shallow breathing
  • Muscle weakness
  • Drowsiness or light-headedness

Get medical help right away if you suspect an overdose.

What Are the Side Effects of Magnesium Citrate?

Most side effects are mild, but some may need medical attention if they persist or worsen.

Common Side Effects

  • Abdominal cramp
  • Diarrhea
  • Bloating
  • Nausea
  • Vomiting
  • Pain with bowel movement
  • Light-headed feeling

Serious Side Effects

Precautions for Magnesium Citrate

Before taking Magnesium Citrate, talk with your doctor if you are allergic to it or any other medications.

Magnesium Citrate should be avoided if there is any serious medical condition like rectal bleeding and intestinal blockage.

Before using the medication, talk with your doctor if you have any medical history, such as:

  • Bowel problems
  • Heart disease
  • Kidney disease
  • Stomach and abdominal pain symptoms

Pregnant or breastfeeding women should use it only under medical advice.
Children and elderly must use it with caution.

Are There Any Drug or Food Interactions with Magnesium Citrate?

Some medicines or supplements may interfere with how Magnesium Citrate works.

  • Speak to your doctor about all the medications, vitamins, or herbal supplements you are taking.
  • Can interact with antibiotics, certain heart medications, or diuretics.
  • Avoid taking with milk or high-fiber foods, as this may reduce effectiveness.

How Should Magnesium Citrate Be Stored?

Proper storage ensures the medicine remains safe and effective for use.

  • Store at room temperature (68°F to 77°F), away from heat, moisture, and direct sunlight.
  • Keep the bottle tightly closed.
  • Keep out of reach of children.
  • Discard any unused solution after 36 hours if not refrigerated.

Magnesium citrate vs Miralax

Magnesium citrate Miralax
Magnesium is a naturally occurring element that is important to many systems in the body, especially muscles and nerves. Magnesium citrate also increases intestinal water Miralax is a brand name over-the-counter (OTC) drug. It is classified as an osmotic laxative.
This product is being used to clean stools from the intestines prior to surgery or certain intestinal procedures (e.g., colonoscopy, radiography), usually with other products. Miralax is used to treat constipation. While it's usually recommended for short-term use, it may also be prescribed for long-term management of chronic constipation in some cases.
Some of the serious side effects of Magnesium Citrate are:
  • Pain with bowel movement
  • Rectal bleeding
  • Painful or difficult while urination
  • Flushing
  • Light-headed feeling
Some of the common and serious side effects of Miralax are:
  • Diarrhea
  • Gas
  • Nausea
  • Stomach Pain
  • Bloating

References

Magnesium oxide-catalysed reaction of carbon dioxide with an epoxide with retention of stereochemistry - Chemical Communications (RSC Publishing)
Magnesium Citrate: MedlinePlus Drug Information
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Frequently Asked Questions

Yes, Magnesium citrate is generally safe and can be taken daily as a dietary supplement, but it is important to follow the dosage instructions provided by a healthcare provider to avoid overconsumption, excessive intake can lead to side effects such as diarrhea, stomach cramps, and electrolyte imbalances.

Magnesium is a mineral essential for various bodily functions. Magnesium citrate is a specific form of magnesium that is bound to citric acid, which enhances its absorption in the body.

Magnesium citrate usually works within 30 minutes to 6 hours to relieve constipation. Effects vary based on dosage and individual response.

Magnesium citrate can promote relaxation and help improve sleep quality due to its role in regulating neurotransmitters involved in sleep.

Individuals with kidney disease, severe heart disease, or those who have had an allergic reaction to magnesium supplements should avoid taking magnesium without medical advice.

Magnesium citrate is often considered one of the best forms of magnesium supplements due to its high bioavailability, meaning the body easily absorbs it.

Yes, magnesium citrate can cause bloating or gas in some people. It works as a laxative, and its effect on the digestive system may lead to temporary bloating or discomfort.

Magnesium citrate can be taken at any time of the day, but taking it with food may reduce the likelihood of gastrointestinal discomfort. For sleep benefits, it may be taken in the evening.

Magnesium citrate is generally safe for people with normal kidney function. However, those with impaired kidney function should use it cautiously and under medical supervision to avoid the risk of hypermagnesemia.

Magnesium citrate is generally used as a laxative and does not typically irritate the bladder. However, in rare cases, it may cause mild discomfort or increase urinary frequency in sensitive individuals. If irritation occurs, consult a doctor.


Disclaimer: The information provided is accurate and up-to-date to the best of our knowledge. However, it should not be considered a substitute for medical advice or consultation. We do not guarantee its completeness or accuracy. The absence of specific warnings does not mean a medicine is safe for all users. We are not responsible for any outcomes based on this information and strongly recommend consulting a doctor for any medical concerns or questions.

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