UK licensed medication

Next day delivery

Discreet packaging

Free expert advice & support

Ubayd Ali

Authored by

Ubayd Ali

Superintendent Pharmacist

Registration Number: 2219322

NHS Pharmacist and founding member of HEBA, with years of experience in healthcare across innovative organisations.
Sufyan Tahir

Reviewed by

Sufyan Tahir

Clinical Governance Lead

Registration Number: 2221275

Review Date 27 March 2026
Next Review 27 March 2028
Published on 27 March 2026
Last Update 27 March 2026

Description

Milk of Magnesia is a saline laxative and antacid that provides dependable relief from constipation and acidity. It draws water into the intestines to soften stools, making them easier to pass. As an antacid, it helps neutralise stomach acid to reduce burning discomfort and bloating. Milk of Magnesia is generally used for occasional digestive relief rather than long-term treatment.

  • Provides gentle relief from occasional constipation
  • Helps neutralise excess stomach acid
  • Can ease heartburn and indigestion
  • Oral liquid suspension for easy dosing

Directions

Shake Milk of Magnesia well before each use to ensure even distribution of the active ingredient. Measure the recommended dose using a proper measuring spoon or cup, and follow the instructions on the product label or those given by your pharmacist.

It is usually taken once daily at bedtime for constipation or as needed for indigestion. Drink a full glass of water after taking Milk of Magnesia and avoid exceeding the stated dose.

Ingredients

Milk of Magnesia contains magnesium hydroxide as the active ingredient, which acts as both a laxative and an antacid. The liquid formulation may also contain purified water, flavourings and stabilising agents to maintain consistency and taste.

Some versions may include additional inactive ingredients to improve palatability. Always check the label for a full list of ingredients, especially if you have allergies or dietary concerns.

Warnings

Do not use Milk of Magnesia if you have kidney problems unless advised by a healthcare professional. Avoid prolonged use, as excessive magnesium intake may cause electrolyte imbalance or dependency for bowel movements.

Consult a doctor if constipation persists for more than a few days or if you experience abdominal pain, nausea or vomiting.

Keep Milk of Magnesia out of reach of children and use only as directed.
 
 
 

Verified customer reviews

Frequently asked questions

  • What is Milk of Magnesia used for?

    Milk of Magnesia is commonly used to relieve occasional constipation and to act as an antacid for heartburn or indigestion. It works by drawing water into the intestines or neutralizing excess stomach acid, depending on the dose taken.

     

  • How quickly does Milk of Magnesia work for constipation?

    When used as a laxative, it typically produces a bowel movement within several hours. For best results, it should be taken with a full glass of water to help support its effect.

     

  • Can Milk of Magnesia be taken every day?

    It is intended for short-term use unless advised otherwise by a healthcare professional. Frequent or prolonged use may lead to electrolyte imbalance or dependency.

     

  • Is Milk of Magnesia safe for children?

    It may be used in children, but only at age-appropriate doses and under medical guidance. Always check the product label or consult a healthcare provider before giving it to a child.

     

  • Are there any side effects associated with Milk of Magnesia?

    Some people may experience diarrhea, stomach cramps, or nausea after use. If symptoms persist or more serious effects occur, medical attention should be sought promptly.
     
     
     

Related treatments

Why go with HEBA?

Why Heba Slide Image

UK-based clinical team

Our specialist clinical team ensure your safety and health. Every treatment is carefully reviewed with treatment provided based on your overall health.

Why Heba Slide Image

Clinically proven treatments, safely prescribed

We are a GPhC registered pharmacy, dispensing medication from MHRA approved facilities. You can rest assured that your medication will always be 100% genuine and authentic.

Why Heba Slide Image

Long term support

We are committed to providing assistance and guidance for your well-being and health, with a focus on long-term health outcomes and holistic support to ensure that you are getting the most from your treatment.

Why Heba Slide Image

Treatment plans personalised to you

We customise your treatment plan to fit your needs and health profile.