How Quickly does Milk of Magnesia Work?

If you’re looking for quick relief from constipation, milk of magnesia may help you. It can relieve constipation within six hours. However, some important things to consider before taking this herbal remedy. These include the dosage, side effects, and safety during pregnancy.

How Quickly Does Milk of Magnesia Work

How Quickly does Milk of Magnesia Work?

How long it takes for the medication to be effective may depend on the type and reason for your constipation. After ingesting milk of magnesia, you should expect a bowel movement within six hours. Bowel movements can occasionally happen in as little as 30 minutes.

Relief from Constipation within 6 Hours

Within six hours, milk of magnesia, a natural laxative, relieves constipation. It works by drawing water into the bowel from adjacent tissue. Milk of Magnesia should only be employed as a final option because it is not advised for long-term constipation. You must strictly adhere to your doctor’s instructions.

This natural laxative is also helpful for indigestion and heartburn. It is an alkaline mineral that reduces stomach acid. It is effective at soothing stomach cramps and relieving constipation and indigestion, but it is not intended for long-term use.

Milk of magnesia can be taken by mouth in a liquid or tablet form. The dosage depends on the type of milk of magnesia you are using, and it may need to be increased or decreased depending on the severity of your constipation.

Adults should take 30 to 60 ml. Children ages six to eleven can take 15 to 30 ml. Taking milk of magnesia with at least eight ounces of water is recommended.


Milk of magnesia is a natural mineral and has several different uses. It is used in antacids and laxatives. It can also be used to relieve mild colic. However, it should be used in moderation and only under the supervision of a medical professional.

It has been used in various ways for centuries by people worldwide. Its most common use is to treat constipation. Even though it is white and looks similar to milk, it is not a dairy product. The dosage of milk magnesia varies according to age, gender, medical history, and route of administration.

Milk of magnesia can increase magnesium levels in the bloodstream. People suffering from magnesium deficiency may experience muscle weakness, irregular heartbeat, or mood swings. They may also experience diarrhea.

Milk of magnesia is not suitable for pregnant women and children under 12 years of age, as it can lead to excessive dehydration.

Safety During Pregnancy

Using milk of magnesia in pregnancy can have many side effects, including nausea, constipation, and diarrhea. It can also lead to dehydration, resulting in uterine muscle contractions. Milk of magnesia should only be used following a doctor’s advice.

Milk of magnesia is generally considered safe during pregnancy, but pregnant women should consult their OB or gynecologist before using it. During pregnancy, a woman should avoid taking milk of magnesia if she takes any prescription medication or has a medical condition. However, milk of magnesia can reduce the effect of other medications and increase the risk of side effects.

Milk of magnesia can be taken in various forms, including chewable tablets and concentrated liquid. The chewable tablets should be chewed before swallowing, while the liquid can be mixed with water or milk. Several doses a day may be taken, although the recommended dosage depends on the severity of the symptoms.

Side Effects

The recommended dosage of milk magnesia for adults is 30 to 60 milliliters a day, but it may vary slightly for children. Children under 12 should always be checked with a doctor before taking this medication.

For most people, a 15-milliliter dose should be taken in the morning, and a similar amount of liquid should be taken at bedtime. This medication should only be taken as prescribed by a doctor and should not be taken for longer than seven days at a time.

There are some concerns about the safety of milk of magnesia for pregnant women. It may lower a woman’s blood salt, harming the developing baby. Still, most physicians believe milk of magnesia is safe for pregnant women. However, they still recommend pregnant women consult a doctor before taking it.

Milk of magnesia can also cause diarrhea and constipation. Those experiencing diarrhea should consult their physician if the condition persists for more than 6 hours after taking milk of magnesia. More than 24 hours of side effects could indicate an underlying medical condition.

What is Milk of Magnesia?

Magnesium hydroxide, a chemical found in the naturally occurring mineral brucite, is used to make milk of magnesia. It is categorized as a saline laxative, which includes salts that cause the intestine to absorb water.

As an alkaline mineral, milk of magnesia can counteract gastric acid. It is designed to be used infrequently and only temporarily to treat some stomach issues.

How is Milk of Magnesia Used?

You can get milk of magnesia as a pill or a drink.

Regardless of the pharmaceutical type you select, carefully read the label to ascertain the recommended dosage for children as it differs from the recommended dosage for adults. It’s always a good idea to get in touch with a medical expert to have them walk you through anything on the label that confounds you.

  • Consuming the tablet or the drink in a full glass (8 ounces) is advised.
  • It is often recommended to take milk of magnesia before night.

If possible, try to take any additional medications at least two hours before or after the milk of magnesia if you must.

Who Should Avoid Taking Milk of Magnesia?

It’s generally okay to eat milk of magnesia after the age of six. Parents of children younger than six should consult their child’s doctor first. I was considering that some prescription medications may interact with milk of magnesia. Before using milk of magnesia, let your doctor know if any of the following describe you:

  • Are you following a restricted-magnesium diet?
  • Are you expecting a child or nursing a baby?
  • You should consult your physician before using any form of laxative.

Treatment for milk of magnesia is only temporary. There could be an underlying medical problem with you. Speak with your doctor if you need to take it frequently to have a bowel movement or if you attempt it and still don’t have regular bowel movements.

Why is the Milk of Magnesia Beneficial?

It is an osmotic laxative that draws water into the intestines, which aids in causing a bowel movement. Additionally, this drug treats indigestion, heartburn, and other symptoms brought on by having too much stomach acid.

Milk of Magnesia can cause bowel motions by decreasing stomach acid and increasing water in the intestines. The laxative Milk of Magnesia is used to treat occasional constipation. As an antacid, Milk of Magnesia is also used to treat heartburn, indigestion, and sour stomach.

Reference: A Cinematic Magnetic Resonance Imaging Study of Milk of Magnesia Laxative and an Antiflatulent Diet to Reduce Intrafraction Prostate Motion

What Makes Milk of Magnesia Work More Quickly?

Take the pill before sleep with a glass of milk or water. Drinking a glass of water or milk would be preferable because these help magnesium hydroxides work better. Furthermore, if you are elderly or otherwise at risk of dehydration, it is imperative (low fluid in the body).

Is Milk of Magnesia a Potent Laxative?

A naturally occurring mineral used to make milk of magnesia can be used as a moderate laxative to treat constipation or acid indigestion. It’s generally secure when used as prescribed. However, consult your doctor before consuming the milk of magnesia if you take medication or have a kidney condition.

Who May Take Magnesium Citrate Safely?

Most people can safely use magnesium citrate in the right amounts. However, some people should not. Before taking magnesium citrate, see your physician, especially if you have the following:

  • Renal illness
  • Abdominal pain
  • Nausea
  • Vomiting
  • An abrupt change in your bowel movements that have persisted for more than a week
  • Sodium– or magnesium-limited diet

Some medicines and magnesium citrate may interact. For instance, magnesium citrate can prevent certain HIV medications from functioning effectively if you are taking them.

Inquire with your doctor whether any supplements or medications you are taking may interact with magnesium citrate.

What Drawbacks does Magnesium Citrate Have?

Although magnesium citrate is generally considered safe, some people may experience negative effects. Mild diarrhea and stomach discomfort are the most frequent side effects. Additionally, you may encounter more severe negative effects, such as:

  • Really bad diarrhea
  • A very bad stomach ache
  • Stool with blood
  • Dizziness
  • Fainting
  • Sweating
  • Weakness
  • An allergic reaction, which could result in symptoms like hives, difficulty breathing, or others
  • Difficulties with the neurological system that could lead to confusion or
  • Depression
  • Cardiovascular conditions include irregular heartbeat or low blood pressure.
  • Heartbeat
  • Metabolic problems like hypomagnesemia or hypocalcemia


For the temporary relief of constipation, milk of magnesia is a well-known and powerful laxative. For constipation, milk of magnesia should not be used for longer than seven days at a time, and for other digestive problems, longer than 14 days at a time. If a person’s symptoms continue, they should see their doctor because continuing symptoms may indicate a more serious gut health condition.

Milk of Magnesia works by luring water from the surrounding tissue into the bowel. This means that various medications, including prescription prescriptions, dietary supplements, and vitamins, may be prevented from being absorbed by the body. Before using milk of magnesia, anyone who takes medicine for a health problem should consult a doctor.