Patient info

Macrogol 10 g powder for oral solution – patient leaflet, side effects, dosage

Updated:
Medicine strength:
10 g
Contains active substance:

Patient leaflet - Macrogol 10 g powder for oral solution

1. What Macrogol is and what it is used for

Macrogol contains the active substance macrogol 4000 and belongs to a group of medicines called osmotic laxatives.

Macrogol carries water to your stool, which loosens and increases stool volume, helping to overcome sluggish bowels.

Macrogol is not absorbed into the bloodstream or broken down in the body.

Macrogol is used for the treatment of constipation in adults and children aged 8 years and over. Macrogol is a powder that you dissolve in a glass of water (at least 50 ml) and then drink. Macrogol works gradually within 24 to 48 hours. The treatment of constipation with any medicine should only be in addition to a healthy lifestyle and diet.

2. What you need to know before you take Macrogol

Do not take Macrogol:

  • if you are allergic (hypersensitive) to

    macrogol (polyethylene glycol) or any of the other ingredients of this medicine (listed in section 6).

  • if you have an existing severe intestinal

    disease such as:

    • inflammatory bowel disease (such as

      ulcerative colitis, Crohn’s disease, abnormal dilation of the bowel

    • perforation of the bowel or risk of

      perforation of the bowel

    • ileus or suspicion of intestinal obstruction
    • painful abdominal conditions of unknown

      cause

Do not take this medicine if any of the above applies to you. If you are not sure, talk to your pharmacist or doctor before taking the medicine.

Warnings and precautions

Cases of allergic reactions involving rash and swelling of the face or throat (angioedema) have been reported in adults after taking products containing macrogol (polyethylene

glycol). Isolated severe allergic reactions have been reported causing faintness, collapse or breathing difficulties and feeling generally unwell. If you experience any of these symptoms you should stop taking Macrogol and seek medical help immediately.

As this medicine can sometimes cause diarrhoea, check with a doctor or pharmacist before taking this medicine if you:

  • have impaired liver or kidney function
  • are taking diuretics (water tablets) or are elderly as you may be at risk of low sodium (salt) or potassium levels in the blood If you experience sudden abdominal pain or rectal bleeding when taking Macrogol for bowel preparation, contact your doctor or seek medical advice immediately.

Before taking Macrogol, talk to your doctor or pharmacist if you know that you have a swallowing disorder.

Avoid mixing Macrogol - PEG laxative and starch-based food thickeners if you have difficulties with swallowing. This may result in a watery liquid which could get into your lungs and cause pneumonia if you can’t swallow properly.

Other medicines and Macrogol

There is a possibility that the absorption of other medicinal products could be transiently reduced during use with Macrogol, particularly medicinal products with a narrow therapeutic index or short half-life such as digoxin, anti-epileptics, coumarins and immunosuppressive agents, leading to decreased efficacy. Tell your doctor or pharmacist if you are taking, have recently taken or might take any other medicines, including medicines obtained without a prescription.

If you need to thicken fluids in order to swallow them safely, Macrogol may counteract the effect of the thickener.

Pregnancy and breast-feeding

Macrogol can be used during pregnancy and breast-feeding.

If you are pregnant or breast-feeding, think you may be pregnant or are planning to have a baby, ask your doctor or pharmacist for advice before taking this medicine.

Driving and using machines

No studies on the effects on the ability to drive and /or use machines have been performed.

Macrogol contains sorbitol

If you have been told by your doctor that you have an intolerance to some sugars, contact your doctor before taking this medicinal product. This medicine contains a small amount of a sugar called sorbitol, can be used if you are diabetic, or if you are on a galactose-free diet. This medicine contains less than 1 mmol sodium (23 mg) per each sachet, that is to say essentially ‘sodium-free’.

3. How to take Macrogol

Always take this medicine exactly as described in this leaflet or as your doctor or pharmacist has told you. Check with your doctor or pharmacist if you are not sure.

Adults and children over 8 years

  • The recommended dose is one to two sachets per day, preferably taken as a single dose in the morning
  • Start by taking one sachet each day and if needed increase to two sachets each day

Package leaflet: Information for the user

Macrogol 10 g powder for oral solution

Macrogol 4000

Version: 14

Date & Time: 05.11.2025 & 6:00 pm Submission: N05093_u15f

  • The daily dose can be adjusted

    according to the effect obtained and may range from one sachet every other day (especially in children) up to a maximum of two sachets per day

  • Dissolve the contents of the sachet

    in a glass of water (at least 50 ml) immediately before use and drink the liquid

Please note:

  • Macrogol usually takes 24 to 48 hours to

    work

  • In the management of children with

    constipation, the duration of treatment with Macrogol should not exceed 3 months

  • Improvement in the frequency of your bowel

    movements after taking Macrogol can be maintained by keeping to a healthy lifestyle and diet.

  • Talk to your pharmacist or doctor if the

    symptoms worsen or do not improve

If you take more Macrogol than you should

Taking too much Macrogol may cause diarrhoea, stomach pains or vomiting. The diarrhoea usually disappears when treatment is stopped or the dose reduced.

If you suffer from severe diarrhoea or vomiting you should contact a doctor as soon as possible as you may require treatment to prevent loss of salts (electrolytes) due to fluid loss.

If you forget to take Macrogol

Take the next dose as soon as you remember but do not take a double dose to make up for a forgotten dose.

4. Possible side effects

Like all medicines, this medicine can cause side effects, although not everybody gets them. The side effects that are usually mild and do not last long include:

In children:

Common (may affect up to 1 in 10 people)

  • Abdominal (belly) pain
  • Diarrhoea which may also cause soreness

    around the back passage (anus)

Uncommon (may affect up to 1 in 100 people)

  • Nausea (feeling sick) or vomiting
  • Abdominal (belly) bloating

Not known (frequency cannot be estimated from available data)

  • Allergic (hypersensitivity) reactions (rash,

    hives (urticaria), swelling of the face or throat, breathing difficulties, faintness or collapse)

In adults:

Common (may affect up to 1 in 10 people)

  • Abdominal (belly) pain
  • Abdominal (belly) bloating
  • Nausea (feeling sick)
  • Diarrhoea

Uncommon (may affect up to 1 in 100 people)

  • Vomiting
  • Urgent need to go to the toilet
  • Faecal incontinence

Not known (frequency cannot be estimated from available data)

  • Low blood levels of potassium which can

    cause muscle weakness, twitching or abnormal heart rhythm

  • Low blood levels of sodium which can cause

    tiredness and confusion, muscle twitching, fits and coma

  • Dehydration caused by severe diarrhoea

    especially in the elderly

    • Symptoms of an allergic reaction such as skin redness, rash, hives (urticaria), swelling of the face or throat, breathing difficulties, faintness or collapse

Reporting of side effects

If you get any side effects, talk to your doctor or pharmacist. This includes any possible side effects not listed in this leaflet. You can also report side effects directly via Yellow Card Scheme Website: www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Store.

By reporting side effects you can help provide more information on the safety of this medicine.

5. How to store Macrogol

Keep this medicine out of the sight and reach of children.

Do not use this medicine after the expiry date which is stated on the carton and sachet after EXP. The expiry date refers to the last day of that month.

This medicine does not require any special storage conditions.

Do not throw away any medicines via wastewater or household waste. Ask your pharmacist how to throw away medicines you no longer use. These measures will help protect the environment.

6. Contents of the pack and other information

What Macrogol contains

  • The active substance is macrogol 4000 Each sachet contains 10 g of macrogol

    4000

  • The other ingredients

    Saccharin Sodium and Orange Grape Fruit

    Flavour (contains orange oil, grape fruit oil, orange juice, citral, acetaldehyde, linalool, ethyl butyrate, alpha terpeniol, octonal, beta & gamma hexenol, maltodextrin, gum arabic, sorbitol (E420), butylated hydroxyanisole (E320)).

What Macrogol looks like and contents of the pack

Macrogol is white or almost white free flowing powder of waxy or paraffin like appearance with orange odour, packed in sachets containing 10, 20 and 30 pack sizes for the preparation of an oral solution

Not all pack sizes may be marketed

Marketing Authorisation Holder

Milpharm Limited

Ares Block, Odyssey Business Park

West End Road

Ruislip HA4 6QD

United Kingdom

Manufacturer

APL Swift Services (Malta) Limited

HF26, Hal Far Industrial Estate, Hal Far, Birzebbugia, BBG 3000

Malta

Milpharm Limited

Ares Block, Odyssey Business Park

West End Road

Ruislip HA4 6QD

United Kingdom

This leaflet was last revised in 11/2025.

About this document

Source: MHRA - Medicines and Healthcare products Regulatory Agency (products.mhra.gov.uk) · Marketing authorisation: PL 16363/0562

Last revision stated in the text: November 2025 · MHRA data as of 13 October 2026

Found a mistake? Tell us on the contact page.

The information on this site does not replace the advice of a doctor or pharmacist.

Facts about Macrogol 10 g powder for oral solution

Active substance Macrogol 4000
Strength 10 g
Marketing authorisation PL 16363/0562

Sources: the MHRA product information (products.mhra.gov.uk). Contains public sector information licensed under the Open Government Licence v3.0.