Macrogol
Macrogol is an osmotic laxative used for constipation when mixed with water, and in bowel cleansing before some procedures when a specific regimen is prescribed. Different brands combine macrogol with salts to reduce electrolyte disturbance.
This medicine is part of the Stomach acid & reflux category.
Generic name: macrogol (polyethylene glycol)
Quick answers
Short replies to searches people often run before speaking to a clinician. For the overview of what the medicine is used for, see the short summary under the page title above.
What is it for?
Macrogol is an osmotic laxative used for constipation when mixed with water, and in bowel cleansing before some procedures when a specific regimen is prescribed.
How long does it take to work?
Onset varies by condition and dose. Your GP or pharmacist can explain what to expect and when to review.
What are common side effects?
Bloating, cramping, nausea, or perianal soreness if diarrhoea is frequent.
Can you take paracetamol or ibuprofen with it?
Ask your GP or pharmacist before taking Macrogol with paracetamol or ibuprofen. Many adults use paracetamol for short periods when appropriate; NSAIDs such as ibuprofen need extra checks with your other medicines and health conditions.
More about what Macrogol is used for
Macrogol is an osmotic laxative used for constipation when mixed with water, and in bowel cleansing before some procedures when a specific regimen is prescribed.
Different brands combine macrogol with salts to reduce electrolyte disturbance.
How does Macrogol work, and how long does it take to work?
It binds water in the bowel, softening and increasing stool volume to stimulate movement.
Onset is often within one to two days for constipation.
How and when should you take Macrogol?
Dissolve sachets fully in the volume stated — taste improves if chilled. Drink additional clear fluids unless told to restrict fluids.
For bowel prep, follow the hospital timetable exactly.
What are the common side effects of Macrogol?
Bloating, cramping, nausea, or perianal soreness if diarrhoea is frequent.
Serious side effects of Macrogol — when to get urgent help
Seek urgent help if you vomit prep and cannot complete colonoscopy preparation — the unit may advise next steps.
Severe dizziness from dehydration needs assessment.
What if you miss a dose of Macrogol?
For constipation, take when remembered. For prep, contact the endoscopy unit if a dose is missed.
Who should not take Macrogol?
Bowel obstruction, perforated gut, severe inflammatory conditions, and some swallowing problems need individual assessment.
Can you take paracetamol or ibuprofen with Macrogol? — other interactions
Rapid diarrhoea can impair absorption of other medicines — separate timing as advised.
Macrogol in pregnancy and breastfeeding
Discuss with your prescriber before bowel prep or regular use in pregnancy.
Blood tests and monitoring on Macrogol
Weight, blood pressure, and electrolytes may be checked if fluid losses are large.
What might your GP prescribe instead of Macrogol?
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Frequently asked questions about Macrogol
People also ask — common Google searches
- What is Macrogol used for?
- Macrogol is an osmotic laxative used for constipation when mixed with water, and in bowel cleansing before some procedures when a specific regimen is prescribed. Different brands combine macrogol with salts to reduce electrolyte disturbance.
- How long does Macrogol take to work?
- Onset varies by condition and dose. Your GP or pharmacist can explain what to expect and when to review. Always follow your prescriber’s follow-up plan.
- Can you take Macrogol with paracetamol or ibuprofen?
- Ask your GP or pharmacist before taking Macrogol with Paracetamol or Ibuprofen. Many adults use paracetamol for short periods when appropriate; NSAIDs such as ibuprofen need extra checks with your other medicines and health conditions.
- What are the side effects of Macrogol?
- Bloating, cramping, nausea, or perianal soreness if diarrhoea is frequent. See the sections below for more detail, including serious side effects and when to seek urgent help.
- Is macrogol the same as Movicol?
- Movicol is a common brand of Movicol. Other brands exist — use the sachets named on your prescription.
- Why must I drink water with macrogol?
- The laxative works by holding water in the bowel; too little fluid can worsen constipation or risk dehydration with high doses.
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