Movicol (Macrogol) in Spain: What It Is For
Medically Reviewed by Dr. Pedro Yelamo Vera, MD
Licensed Physician No. 484814280 · Official Medical College of Bizkaia (Spain)Last reviewed: 29 October 2026
Movicol is macrogol, a laxative powder for constipation and faecal impaction. How it works, the children's version, and why Spain requires a prescription.
You don't have to figure this out alone
Dr. Pedro Yelamo Vera is an independent, bilingual GP licensed in Spain. Book a 15-minute video consultation in English or Spanish for €50, with a private electronic prescription issued under Spanish law when clinically appropriate.
Movicol is the brand name of macrogol, an osmotic laxative sold as a powder in sachets that you mix with water. In Spain it treats long-term constipation and faecal impaction, where hard stool is stuck in the bowel. There is a separate children's version, Movicol Pediátrico. Every Movicol pack sold in Spain needs a prescription.
- Movicol (macrogol 3350 with salts) holds water in the bowel, so stools get softer and bigger and are easier to pass.
- It is used for chronic constipation and, after a doctor checks, for faecal impaction.
- Movicol Pediátrico is the children's version. The adult sachet is not meant for children under 12.
- In Spain every Movicol pack is prescription-only. In the UK some packs are sold in pharmacies, and in the US MiraLAX is a similar powder.
Dr. Pedro Yelamo Vera is a GP licensed in Spain (Colegiado No. 484814280).
For a medical emergency, call 112 or go to the nearest local emergency department. Do not wait for a video consultation or an online reply.
What is Movicol used for?
The Spanish leaflet lists two uses:
- Chronic constipation: hard, dry stools, straining, or going less often than usual for weeks.
- Faecal impaction: a large mass of hard stool stuck in the rectum or colon that has not shifted with other laxatives. A doctor should confirm it first, with an exam of the tummy and back passage.
Each sachet holds macrogol 3350 plus small amounts of salt, potassium and bicarbonate. The salts are there so the body does not gain or lose fluid or salts while the powder works.
How does macrogol work, and how long does it take?
Macrogol is a long molecule that the gut does not absorb. It stays in the bowel and holds on to the water you drink with it. The stool takes up that water, gets softer and bulkier, and the bowel moves it along more easily.
It is not a stimulant laxative, so it does not force the bowel to squeeze. It is gentle, not fast. MedlinePlus notes it may take two to four days to bring on a bowel movement. Keep drinking water during the day: the leaflet warns that Movicol does not replace your normal fluids.
Movicol, Laxido, MiraLAX: which name is which?
| Name | What it contains | Where |
|---|---|---|
| Movicol | Macrogol 3350 + salts, powder in sachets | Spain (prescription), UK, Ireland |
| Movicol Pediátrico | Smaller sachet for children | Spain (prescription) |
| Laxido, CosmoCol | Macrogol 3350 + salts | UK |
| MiraLAX | Macrogol 3350 (PEG 3350) without the salts | US |
| Casenlax, Molaxole, Bimotil | Other macrogol laxatives | Spain (prescription) |
| Moviprep, Pleinvue | Macrogol bowel-cleansing kits | Spain, before a colonoscopy only |
If you used Laxido or Movicol in the UK, or MiraLAX in the US, a doctor in Spain can tell you which local product matches it. The bowel-cleansing kits are a different use. Never take them for everyday constipation.
Do you need a prescription for Movicol in Spain?
Yes. On the AEMPS CIMA database, every Movicol pack on sale in Spain is listed as a medicamento sujeto a prescripción médica. That includes the plain, neutral-flavour, orange and children's versions. The other macrogol laxatives on sale in Spain are listed the same way. A pharmacy needs a Spanish prescription, which can be a private electronic one.
In the UK and the US some packs are sold off the shelf, so this often surprises visitors.
Constipated for weeks, or worried about a child who has not been for days?
You can book a video visit with a GP licensed in Spain, in English or Spanish. He asks the right questions, checks for warning signs and explains whether macrogol suits you.
Can children take Movicol?
Children use Movicol Pediátrico, a smaller sachet. Its Spanish leaflet covers chronic constipation from 1 to 11 years. For faecal impaction it is only for children aged 5 and over. It is not for babies under 1.
A doctor should decide how much a child takes and for how long. Regular toilet time, water and fibre help as much as the powder.
What Movicol does not treat
- Diarrhoea, or a stomach bug. A laxative will make it worse.
- A blocked or torn bowel (obstruction, perforation, ileus). The leaflet says not to use it.
- A flare of Crohn's disease or ulcerative colitis, or toxic megacolon.
- Weight loss. Laxatives do not remove fat, and misuse can upset your salts.
- The cause of the constipation. Some medicines, a low-fibre diet, an underactive thyroid or a bowel problem may need their own care.
Our constipation page explains the usual causes and what a GP checks first.
Who should take care with it?
- People on a low-salt diet, or with heart or kidney problems: Movicol contains sodium.
- People taking other medicines: macrogol can briefly cut how well some of them are absorbed.
- Pregnancy and breastfeeding: the leaflet says it can be used, as very little enters the blood. Tell your doctor or midwife first.
Side effects and when to see a doctor
Most side effects affect the gut: tummy ache, bloating, wind, rumbling, nausea and loose stools. They often ease if the amount is lowered. Headache and swollen ankles are also listed. Allergic reactions and changes in potassium are rare. See a doctor if:
- There is blood in your stools, or they are black.
- You are losing weight without trying.
- You have strong tummy pain, a swollen belly or you keep vomiting.
- You are over 50 and constipation is new, or comes and goes with diarrhoea.
- You still have constipation after two weeks of using it.
- You feel weak, very tired or swollen, which can mean your salts are off.
Call 112 if you have severe tummy pain with vomiting and cannot pass wind, or swelling of the face, lips or throat, or trouble breathing.
Talking it through with a doctor by video
Dr. Yelamo is a GP licensed in Spain. He sees adults, children and pregnant patients by video, every day from 07:30 to 20:30 (Spain time). In the visit he will:
- Ask how long it has lasted, what your stools are like, and which medicines and foods you take.
- Check for warning signs that need tests or an in-person exam.
- Explain whether macrogol, another laxative or a change in habits fits you or your child best.
- Tell you how to stop a laxative safely once things are back to normal.
He does not promise any test or prescription before the visit. Where clinically appropriate, following a genuine evaluation. Treatment and prescriptions are issued solely at the doctor's discretion based on evidence-based clinical guidelines.
A prescription is never guaranteed: it is issued only where clinically appropriate after a genuine evaluation, as a private electronic prescription under Spanish law. This service is for urgent, non-emergency care. In an emergency, call 112.
See how the Urgent Care video visit works. It lasts 15 minutes and costs €50.
This guide is general information. It does not replace the package leaflet or the advice of your doctor or pharmacist.
Frequently asked questions
Is Movicol the same as macrogol?
Yes. Movicol is a brand of macrogol 3350 with added salts. Laxido and CosmoCol in the UK are the same type of product. MiraLAX in the US has macrogol without the salts.
Can I buy Movicol without a prescription in Spain?
No. CIMA lists every Movicol pack on sale in Spain as prescription-only, and the other macrogol laxatives too. A pharmacist can still advise on fibre and fluids.
How long does Movicol take to work?
It is gentle rather than fast. It can take two to four days to bring on a bowel movement. Drink water through the day while you take it.
Is Movicol safe for children?
Children use Movicol Pediátrico. It covers constipation from 1 to 11 years, and impaction from age 5. A doctor should decide how much and for how long.
Can I take Movicol when pregnant?
The Spanish leaflet says it can be used in pregnancy and breastfeeding, as very little reaches the blood. Check with your doctor or midwife first.
What is the difference between Movicol and Duphalac?
Both are osmotic laxatives. Movicol is macrogol powder that the gut does not break down. Duphalac is lactulose syrup, a sugar that gut bacteria ferment, so it causes more wind at first.
Sources
- AEMPS CIMA: Movicol summary of product characteristics
- AEMPS CIMA: Movicol Pediátrico summary of product characteristics
- NHS: Macrogol
- MedlinePlus: Polyethylene glycol 3350
Related guides
Medical Citations & Sources
This content is written and reviewed by a licensed physician with reference to the following official health authorities.
