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ColonX

Generic name: magnesium citrate

Brand names: Citrate of Magnesia, Citroma Cherry, ColonX, Natrol Mood + Stress, OneLAX Magnesium Citrate, Citroma

Used for constipation
Last updated November 2, 2026 0 views
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What is ColonX?

ColonX is used as a supplement to keep enough magnesium in the body.

ColonX is also used as a laxative to help with occasional constipation.

ColonX may also be used for reasons not mentioned in this medication guide.

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How should I take ColonX?

Use exactly as directed on the label, or as prescribed by your doctor.

Your dose may change if you switch to a different brand, strength, or form of this medicine. Avoid medication errors by using exactly as directed on the label, or as prescribed by your doctor.

Take with a full glass (8 ounces) of liquid with each dose.

Shake the liquid medicine. Measure a dose with the supplied measuring device (not a kitchen spoon).

You must chew the chewable tablet before you swallow it.

Taking more than your recommended dose will not make this medicine more effective and may cause serious side effects.

When used for constipation, call your doctor if your symptoms do not improve after 7 days of treatment, or if the medicine produces no results. Not having a bowel movement after using a laxative may be a sign of a condition more serious than occasional constipation.

Store at cool room temperature away from moisture and heat.

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Warnings

Follow all instructions on the label and package. Use exactly as directed. Inform your healthcare provider if you are taking other medicines or have any other medical conditions or allergies.

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Before taking this medicine

Ask a doctor or pharmacist if ColonX is safe to use if you have or have ever had:

  • a sudden change in bowel habits that has lasted longer than 2 weeks;
  • stomach pain, nausea, vomiting;
  • trouble swallowing;
  • if you are on a low-magnesium, low-sodium, or low-potassium diet; or
  • kidney disease.

Ask a doctor before using this medicine if you are pregnant or breastfeeding.

Do not allow a young child to use ColonX without help from an adult.

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ColonX side effects

Get emergency medical help if you have signs of an allergic reaction: hives, difficulty breathing, swelling of your face, lips, tongue, or throat.

ColonX may cause serious side effects. Stop using ColonX and call your doctor right away if you have:

  • pain with bowel movements, rectal bleeding;
  • watery diarrhea, nausea, vomiting, severe stomach pain;
  • painful or difficult urination;
  • flushing (warmth, redness, or tingly feeling);
  • feeling light-headed, like you might pass out;
  • weak or shallow breathing, slow heartbeats; or
  • muscle weakness, increased thirst.

Common side effects of ColonX may include:

  • loose stools, diarrhea, stomach cramps;
  • upset stomach;
  • dizziness; or
  • increased sweating.

This is not a complete list of side effects, and others may occur. Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.

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What happens if I miss a dose?

ColonX is used as needed. If you are on a dosing schedule and miss a dose, take it as soon as you remember. If it is almost time for your next dose, skip the missed dose. Do not take two doses at the same time.

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What happens if I overdose?

Seek emergency medical help or call the Poison Help line at 1-800-222-1222.

Do not take any other medicines within 2 hours before or 2 hours after you take ColonX. Laxatives can make it harder for your body to absorb other medicines you take by mouth.

Ask a doctor or pharmacist before using over-the-counter medicines that may have ingredients similar to ColonX.

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What other drugs will affect ColonX?

Other drugs may affect ColonX, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell your doctor about all other medicines you use.

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Common questions about magnesium citrate

When is the best time to take magnesium, morning or night?
The best time of day to take magnesium depends on your health goals and individual needs. While timing can enhance specific benefits, maintaining a consistent routine is more important for stable magnesium levels in the body. Many studies show the full benefits of magnesium occur after long-term use. Continue reading
Should I take magnesium with or without food?
It is generally recommended to take magnesium with food to help lower the chances for an upset stomach and increase the absorption of the mineral into your body. If you take magnesium on an empty stomach, you increase the risk for common stomach side effects like diarrhea, nausea and abdominal cramping. Continue reading
How long does magnesium citrate take to work?
According to the information provided with magnesium citrate liquid products, you can generally expect it to cause a bowel movement anywhere from 30 minutes to 6 hours after you drink it. Continue reading
Does magnesium help with bloating and digestion?
Yes, magnesium can help with bloating and digestion in several ways. Millions of people struggle with digestive discomfort, including bloating and constipation. Some types of magnesium have a laxative effect, and it can support digestion in other ways as well. Continue reading
Does magnesium help with restless leg syndrome (RLS)?
The evidence regarding magnesium's effectiveness for restless leg syndrome presents a complex picture. While some research suggests a beneficial effect, particularly for individuals with magnesium deficiency, other studies find no significant correlation between magnesium levels and RLS severity. Continue reading
What type of magnesium should I take?
The right type of magnesium depends on your health goals and personal needs. Different forms of magnesium have different benefits and levels of bioavailability. Continue reading
Does magnesium help with migraines and headaches?
The current evidence supports a role for magnesium in both the prevention and treatment of headache disorders, particularly migraines. Continue reading
Does magnesium help with weight loss?
While magnesium alone will not lead to significant weight loss, its ability to regulate blood sugar levels, reduce inflammation, improve gut health, boost metabolism, and enhance sleep quality makes it a valuable component of a holistic approach to weight management. Continue reading

Related medicines

Before you take this medicine: the information on this page is general and may not cover your personal circumstances. Read the label supplied with your medicine and ask a pharmacist or doctor if you are unsure, especially if you are pregnant, breastfeeding, taking other medicines or managing a long-term condition.
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Content is provided for education and is not medical advice. See our medical disclaimer.