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MagGel

Generic name: magnesium oxide

Brand names: Phillips' Cramp-free, Uro-Mag, MagGel

Last updated November 2, 2026 0 views
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What is MagGel?

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

MagGel is also used to help with indigestion, upset stomach, or as a laxative to relieve occasional constipation.

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

This section was rewritten for readability and reviewed for meaning.

How should I take MagGel?

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

Take this medicine with a full glass of water.

When using this medicine as a laxative, it may be best to take your dose at bedtime.

MagGel may be taken with food if it upsets your stomach.

Stop using MagGel and call your doctor if your symptoms do not improve after 7 days of treatment, or if they get worse.

Store at cool room temperature away from moisture and heat.

This section was rewritten for readability and reviewed for meaning.

Warnings

Follow all directions on the label and package. Use exactly as directed.

This section was rewritten for readability and reviewed for meaning.

Before taking this medicine

You should not take MagGel if you are allergic to it.

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

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

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

Do not give this medicine to a child without medical advice.

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MagGel side effects

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

Stop using MagGel and call your doctor right away if you:

  • have rectal bleeding; or
  • do not have a bowel movement after using MagGel as a laxative.

Common side effects of MagGel may include:

  • nausea, vomiting;
  • diarrhea; or
  • stomach pain, loss of appetite.

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

This section was rewritten for readability and reviewed for meaning.

What happens if I miss a dose?

MagGel is used as needed. If you have 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 attention or call the Poison Help line at 1-800-222-1222.

Overdose symptoms may include nausea, vomiting, weakness, breathing problems, slow reflexes, extreme drowsiness, loss of consciousness, and feeling dizzy or light-headed.

Avoid taking other medications at the same time you use an antacid. Some antacids can make it harder for your body to absorb other medicines you take by mouth.

This section was rewritten for readability and reviewed for meaning.

What other drugs will affect MagGel?

Ask a doctor or pharmacist before using MagGel with any other medicines, especially:

  • sevelamer;
  • an antibiotic; or
  • a diuretic or "water pill".

This list is not complete. Other drugs may affect MagGel, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are listed here.

This section was rewritten for readability and reviewed for meaning.

Common questions about MagGel

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
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
Can magnesium help with menopause symptoms?
A placebo-controlled study showed that 800 mg to 1,200 mg per day of magnesium oxide did not have a significant effect in reducing hot flash symptoms in menopausal women with a history of breast cancer. A smaller study did show a positive effect with 400 mg to 800 mg, but did not include a placebo (control) group. Further research is needed in a more generalized population. Continue reading

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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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