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Movicol Sachets - 13.8g

Movicol Sachets - 13.8g

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  • ✔️ Relieves constipation by softening stools osmotically
  • ✔️ Treats faecal impaction with a short high-dose regimen
  • ✔️ Suitable for adults and adolescents aged 12 and over
  • ✔️ Contains electrolytes to minimise fluid imbalance during use
  • ✔️ Macrogol 3350 is not absorbed — acts locally in the bowel

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What Are Movicol Sachets and How Do They Treat Constipation?

 

Constipation is one of the most common digestive complaints in the UK, affecting people of all ages. It can leave you feeling uncomfortable, bloated, and frustrated — especially when it lingers for days. Movicol sachets are a clinically established osmotic laxative used to relieve constipation and treat faecal impaction in adults and children aged 12 and over. Each 13.8g sachet contains a balanced combination of macrogol 3350, sodium chloride, sodium bicarbonate, and potassium chloride, working together to restore normal bowel function gently and reliably. You can browse our full range of constipation treatments if you'd like to compare your options.

Movicol is available over the counter without a prescription for standard constipation in adults and adolescents aged 12 and above. It's widely recommended by GPs and pharmacists across the UK and is listed on the NHS as a first-line treatment for constipation.

 

How Do Movicol Sachets Work to Relieve Constipation?

 

Movicol sachets work through a process called osmosis. The active ingredient, macrogol 3350, is a long-chain polymer that is not absorbed by the gut. Instead, it retains water within the bowel lumen, increasing the water content of the stool. This makes stools softer and easier to pass, and stimulates the natural movement of the bowel.

  • Macrogol 3350 draws water into the colon via osmotic pressure
  • Stool consistency softens, reducing straining during bowel movements
  • Bowel transit time is shortened, helping restore regularity
  • Electrolytes (sodium, potassium, bicarbonate) are included to prevent fluid and electrolyte imbalance

Because macrogol is not absorbed into the bloodstream, it acts locally within the gut. This makes it a well-tolerated option for most people, including those who have found stimulant laxatives too harsh.

 

Who Is Movicol Suitable For?

 

Movicol sachets are suitable for a wide range of people experiencing constipation. They're particularly useful when dietary changes and increased fluid intake haven't been enough to resolve the problem. That said, they're not appropriate for everyone — always read the patient information leaflet before starting treatment.

  • Adults aged 18 and over with chronic or acute constipation
  • Adolescents aged 12–17 years (under adult supervision)
  • Adults with faecal impaction requiring a higher-dose regimen
  • People who have not responded to bulk-forming or stimulant laxatives

Movicol is not recommended for children under 12 — a separate paediatric formulation (Movicol Paediatric Plain) exists for younger children and should be used instead. If you're managing other gut-related symptoms alongside constipation, our IBS and cramps collection may also be worth exploring.

 

How Do Movicol Sachets Compare to Other Laxatives?

 

Feature Movicol Sachets 13.8g Senna (Stimulant Laxative)
Mechanism Osmotic — retains water in bowel Stimulant — triggers bowel contractions
Onset of action 1–2 days typically 6–12 hours
Suitable for faecal impaction Yes (higher dose regimen) No
Risk of dependency Low Higher with long-term use

 

How Should Movicol Sachets Be Stored?

 

Store Movicol sachets below 25°C in a dry place, away from direct sunlight. Keep them out of reach and sight of children. Once dissolved in water, the solution should be used within 6 hours — do not prepare sachets in advance and store them for later. Check the expiry date on the packaging before use and do not use if the sachet is damaged or the seal is broken.

This product is a medicine. Speak to your doctor or pharmacist before using if you have an underlying medical condition or are taking other medicines.

Movicol Sachets 13.8g specifications
Treatment category Constipation / Faecal impaction
Mechanism of action Osmotic laxative
Effective for Constipation and faecal impaction
Suitable for Adults and adolescents aged 12 and over
Active ingredient Macrogol 3350, sodium chloride, sodium bicarbonate, potassium chloride
Pack sizes 8, 20, 30 sachets
Strength 13.8g per sachet
UK classification P (Pharmacy medicine)
Drug class Osmotic laxative (macrogol)
Preparation Oral powder for solution
Route of administration Oral

Specifications of Movicol Sachets 13.8g

 

What Is Movicol and What Is It Used For?

 

Movicol sachets 13.8g contain macrogol 3350 alongside electrolytes and are classified as an osmotic laxative. They are used to treat constipation in adults and adolescents aged 12 and over, and can also be used at higher doses to treat faecal impaction — a condition where a large, hard mass of stool becomes stuck in the rectum. The NHS recommends macrogol-based laxatives as a first-line treatment for constipation, particularly when lifestyle measures alone have not worked.

Movicol sachets are not a stimulant laxative and do not cause the bowel to contract artificially. Instead, they work by increasing the water content of the stool, making it softer and easier to pass naturally.

 

What Do You Need to Know Before Using Movicol Sachets?

 

Before using Movicol, it's important to check whether it is appropriate for you. Do not use Movicol if any of the following apply:

  • You have a known bowel obstruction or suspected intestinal perforation
  • You have been diagnosed with toxic megacolon
  • You have severe or active inflammatory bowel disease (such as Crohn's disease or ulcerative colitis in a severe flare)
  • You are allergic to macrogol 3350 or any of the other ingredients
  • You have a condition causing difficulty swallowing or retaining fluids

Speak to your GP or pharmacist before using Movicol if you have heart disease, kidney problems, or are on a sodium-restricted diet, as the electrolyte content may be relevant to your care. The following medicines may interact with Movicol:

  • Medicines that require careful blood level monitoring (macrogol may theoretically affect absorption timing, though clinically significant interactions are rare at standard doses)
  • Other laxatives — combining multiple laxatives should only be done under medical advice

 

How Should You Use Movicol Sachets?

 

Always use Movicol exactly as directed on the packaging or as advised by your pharmacist or GP. Here's how to prepare and take each dose:

  1. Open one sachet and pour the contents into a cup or glass
  2. Add 125ml (approximately half a cup) of water
  3. Stir well until the powder is completely dissolved — the solution should be clear
  4. Drink the solution immediately or within 6 hours of preparation
  5. Spread your daily doses evenly throughout the day rather than taking them all at once
Indication Age Group Dose Frequency
Constipation Adults & adolescents 12+ 1–3 sachets daily In divided doses
Faecal impaction Adults 18+ Up to 8 sachets daily Over max 3 days (medical guidance advised)

If you are managing haemorrhoids alongside constipation, softening stools with Movicol can help reduce discomfort. You may also find our haemorrhoids and piles collection helpful for additional symptom relief.

 

What Are the Possible Side Effects of Movicol Sachets?

 

Like all medicines, Movicol can cause side effects, although not everyone experiences them. Most side effects are related to the dose and tend to improve once the dose is adjusted.

Common side effects (may affect up to 1 in 10 people):

  • Abdominal bloating or distension
  • Stomach cramps or pain
  • Nausea
  • Diarrhoea (particularly if the dose is too high)
  • Flatulence

Less common side effects (may affect up to 1 in 100 people):

  • Vomiting
  • Anal discomfort
  • Electrolyte disturbances (more likely with high-dose regimens)
  • Allergic reactions including rash, urticaria, or anaphylaxis (rare — seek immediate medical attention)

If you experience severe abdominal pain, blood in your stool, or signs of an allergic reaction, stop taking Movicol and seek medical advice promptly. If you're also experiencing indigestion or heartburn alongside constipation, our indigestion range may offer additional support.

 

How Should You Store Movicol Sachets?

 

  • Store below 25°C in a dry place
  • Keep away from direct sunlight and moisture
  • Keep out of the reach and sight of children
  • Once dissolved in water, use the solution within 6 hours
  • Do not use after the expiry date printed on the packaging
  • Do not use sachets that appear damaged or have a broken seal
  • Dispose of unused medicines via your local pharmacy — do not flush down the toilet or put in household waste

Written and reviewed by our qualified team

Your safety and success are our highest priorities. Our medical team rigorously evaluates every product and piece of advice we provide, ensuring you receive only the most effective, science-backed solutions available.

Frequently Asked Questions

Where can I buy Movicol sachets online in the UK?

You can buy Movicol sachets online from Cured Pharmacy, a GPhC-registered UK online pharmacy. No prescription is required for standard constipation treatment in adults and adolescents aged 12 and over. Simply add to your basket and your order will be dispatched promptly from our registered pharmacy.

How do Movicol sachets work in the body?

Movicol sachets contain macrogol 3350, an osmotic laxative that works by drawing water into the bowel from surrounding tissues. This increases the water content of the stool, making it softer and easier to pass. Unlike stimulant laxatives, macrogol does not cause the bowel to contract artificially, which makes it gentler for most people.

How do I use Movicol sachets step by step?

Dissolve one sachet in 125ml of water, stir until the powder is fully dissolved, and drink the solution. Spread your daily doses evenly throughout the day rather than taking them all at once. The dissolved solution should be used within 6 hours of preparation — do not store it for later.

What is the correct dose of Movicol sachets for adults?

For constipation, adults and adolescents aged 12 and over should take 1 to 3 sachets per day in divided doses. For faecal impaction in adults, up to 8 sachets per day may be taken over a maximum of 3 days, ideally under medical supervision. Always follow the instructions on the patient information leaflet.

When is the best time to take Movicol sachets?

There is no single "best" time — Movicol sachets can be taken at any time of day with or without food. Spreading doses evenly throughout the day (for example, morning, midday, and evening) tends to work well for most people. Consistency is more important than timing, so try to take your doses at roughly the same times each day.

What are the common side effects of Movicol sachets?

The most common side effects include abdominal bloating, stomach cramps, nausea, flatulence, and diarrhoea — particularly if the dose is higher than needed. These effects usually improve once the dose is reduced. If you experience severe abdominal pain or blood in your stool, stop taking Movicol and seek medical advice promptly.

How do I manage side effects of Movicol sachets?

If you experience bloating or cramping, try reducing your dose by one sachet per day and see if symptoms improve. Drinking plenty of water throughout the day can also help. If side effects persist or are severe, speak to your pharmacist or GP before continuing treatment.

Who should not use Movicol sachets?

Movicol should not be used by people with bowel obstruction, intestinal perforation, toxic megacolon, or severe inflammatory bowel disease. It is also not suitable for children under 12 — a separate paediatric formulation is available for younger children. Always read the patient information leaflet and speak to a pharmacist if you are unsure whether Movicol is right for you.

Can I use Movicol sachets during pregnancy?

Constipation is very common during pregnancy, and macrogol-based laxatives are generally considered safe to use. However, you should always speak to your GP or midwife before starting any new medicine during pregnancy. They can advise on the most appropriate treatment based on your individual circumstances.

What happens if I miss a dose of Movicol sachets?

If you miss a dose, simply take your next dose at the usual time — do not double up to compensate. Missing a single dose is unlikely to cause any problems, but try to maintain a consistent routine for the best results. If you regularly forget doses, setting a daily reminder can help.

How long can you take Movicol sachets for?

For constipation, Movicol sachets can be used for up to 2 weeks without medical supervision. If your symptoms have not improved after 2 weeks, or if constipation keeps returning, speak to your GP. Long-term use should only continue under medical guidance, as persistent constipation may have an underlying cause that needs investigation.

What are the alternatives to Movicol sachets for constipation?

Alternatives include bulk-forming laxatives such as ispaghula husk (Fybogel), stimulant laxatives such as senna or bisacodyl, and stool softeners such as docusate sodium. The right choice depends on the type and severity of your constipation. You can explore our full constipation treatments range to compare your options.

Can Movicol sachets be used for faecal impaction?

Yes — Movicol is licensed for the treatment of faecal impaction in adults at a higher dose of up to 8 sachets per day for a maximum of 3 days. This regimen should ideally be carried out under medical supervision, particularly in older adults or those with other health conditions. If you suspect faecal impaction, speak to your GP before starting treatment.

Does Movicol interact with other medicines?

Clinically significant drug interactions with Movicol at standard doses are rare, as macrogol is not absorbed into the bloodstream. However, if you take medicines that require careful monitoring of blood levels, it is worth mentioning Movicol to your pharmacist. You should also avoid combining multiple laxatives without medical advice. If you're managing other digestive symptoms, our IBS and cramps collection may offer complementary support.

What are the latest studies on macrogol for constipation?

Macrogol 3350 has been extensively studied and is consistently recommended in clinical guidelines as a first-line osmotic laxative for constipation in adults and children. The NHS and NICE both support its use based on a strong evidence base demonstrating efficacy and a favourable safety profile. Research continues to confirm that macrogol is well-tolerated for both short-term and longer-term use under medical supervision.

How Should You Use Movicol Sachets?

Using Movicol sachets correctly makes a real difference to how well they work. Each sachet must be dissolved in water before drinking — never swallow the powder dry. Follow these steps each time you take a dose:

Do not prepare multiple sachets in advance and store them — always make each dose fresh. If you find the taste difficult, you can use a cold or warm drink instead of plain water, though avoid very hot liquids.

What Is the Correct Dose of Movicol Sachets?

The dose of Movicol depends on what you are treating and your age. For most adults with constipation, starting with one sachet per day and increasing gradually is a sensible approach. Always start at the lower end of the dose range and adjust based on your response.

Do not exceed 3 sachets per day for constipation without speaking to your GP first. The faecal impaction regimen should ideally be supervised by a healthcare professional.

When Is the Best Time to Use Movicol Sachets?

Movicol sachets can be taken at any time of day — there is no strict requirement to take them with or without food. Many people find it easiest to take one sachet in the morning, one at lunchtime, and one in the evening if they are on a three-sachet daily dose. Consistency matters more than the specific time, so try to build your doses into a routine that suits your daily schedule.

Movicol typically takes 1 to 2 days to produce a bowel movement, so don't be concerned if you don't notice an effect immediately after your first dose. Give it a little time before adjusting your dose.

How Long Can You Use Movicol Sachets For?

For the treatment of constipation, Movicol sachets can be used for up to 2 weeks without needing to consult a doctor. If your constipation has not resolved after 2 weeks, or if it keeps coming back, it's important to speak to your GP — persistent constipation can sometimes indicate an underlying condition that needs further investigation.

For faecal impaction, the higher-dose regimen should not exceed 3 days. Long-term use of Movicol beyond 2 weeks for constipation should only continue under medical supervision. Once your bowel movements have returned to normal, you can stop taking Movicol gradually rather than stopping abruptly.

Do not exceed the recommended dose. If in doubt, speak to your pharmacist.

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What Are the Most Common Side Effects of Movicol Sachets?

Most people tolerate Movicol sachets well, but some do experience side effects — particularly when starting treatment or if the dose is higher than needed. Common side effects tend to be gastrointestinal in nature and usually settle once your body adjusts or the dose is reduced.

  • Abdominal bloating or a feeling of fullness
  • Stomach cramps or discomfort
  • Nausea
  • Flatulence (wind)
  • Diarrhoea (especially if the dose is too high)

If diarrhoea occurs, reduce your dose by one sachet per day. If it continues, stop taking Movicol and speak to your pharmacist or GP.

What Are the Less Common Side Effects of Movicol Sachets?

Less common side effects affect a smaller proportion of people and are more likely to occur with higher doses, such as those used for faecal impaction. If you notice any of the following, speak to your pharmacist or GP:

  • Vomiting
  • Anal discomfort or irritation
  • Electrolyte disturbances (such as low sodium or potassium levels) — more likely with prolonged high-dose use
  • Peripheral oedema (swelling of the ankles or feet)
  • Headache

What Are the Serious Side Effects of Movicol Sachets?

Serious side effects are rare but require immediate medical attention. Stop taking Movicol and seek urgent help if you experience any of the following:

  • Signs of a severe allergic reaction — including skin rash, hives (urticaria), swelling of the face, lips, tongue, or throat, difficulty breathing, or anaphylaxis
  • Severe or worsening abdominal pain
  • Blood in your stool or rectal bleeding
  • Sudden change in bowel habits lasting more than 2 weeks

These symptoms may indicate a more serious underlying condition and should not be ignored.

What Should You Do If You Experience Side Effects?

If you experience mild side effects such as bloating or cramping, try reducing your dose by one sachet per day and see whether symptoms improve. Drinking plenty of water throughout the day can also help your body adjust. For most people, side effects are temporary and manageable.

If side effects are severe, persistent, or worrying, stop taking Movicol and contact your GP or pharmacist. You can also report side effects directly to the MHRA via the Yellow Card scheme at yellowcard.mhra.gov.uk.

Can Movicol Sachets Interact With Other Medicines?

Clinically significant drug interactions with Movicol at standard doses are uncommon, as macrogol 3350 is not absorbed into the bloodstream. However, because Movicol increases gut transit time, it could theoretically affect the absorption of other medicines taken at the same time. If you take medicines that require precise blood level monitoring — such as certain epilepsy or heart medicines — mention Movicol to your pharmacist before starting. Avoid combining Movicol with other laxatives unless specifically advised to do so by a healthcare professional.

If you are concerned about any side effects, contact your pharmacist or GP immediately.

Patient Information Leaflet

Important - Before taking any medication, it is always important to read the Patient Information Leaflet (PIL)

Written and reviewed by our qualified team

GPhC Number: 2233073
Tarun Kumar

Reviewed by:

Tarun Kumar

Superintendent/ Clinical Lead

📖 Find out more about our team of medical content authors and how we ensure the accuracy of our content with our content guidelines.

Content last updated: 31 Mar 2025

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