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Micralax Micro Enema (Pack of 12) – Fast-Acting Constipation Solution

Micralax Micro Enema (Pack of 12) – Fast-Acting Constipation Solution

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  • ✔️ Relieves constipation fast — typically within 5 to 15 minutes
  • ✔️ Acts locally in the rectum for targeted, effective relief
  • ✔️ Suitable for adults and children over 3 years
  • ✔️ Minimal systemic absorption reduces whole-body side effects
  • ✔️ Pack of 12 single-dose tubes for convenient home use

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What Is a Micro Enema for Constipation?

 

Constipation is one of the most common digestive complaints in the UK, affecting people of all ages at some point in their lives. When dietary changes, hydration, and oral laxatives haven't done the job, a micro enema for constipation can offer targeted, fast-acting relief. Micralax Micro Enema is a small, single-dose rectal solution that works locally in the bowel — no tablets to swallow, no waiting hours for an oral medicine to travel through your system. Each pack contains 12 individual tubes, making it a practical option to keep at home for when constipation strikes. If you're also managing related digestive discomfort, you might find our IBS and cramps collection useful alongside this product.

Each 5 ml tube contains sodium citrate 450 mg, sodium lauryl sulphoacetate 45 mg, and sorbic acid 5 mg as a preservative. These ingredients work together in the rectum to soften and lubricate the stool, encouraging a natural bowel movement — typically within 5 to 15 minutes.

 

How Does Micralax Micro Enema Work?

 

The mechanism is straightforward. Rather than stimulating the whole gut like some oral laxatives, Micralax acts directly where the problem is — in the lower bowel. Here's what happens after administration:

  • Sodium citrate displaces water-binding ions in the faecal mass, releasing bound water into the stool.
  • Sodium lauryl sulphoacetate acts as a surfactant, reducing surface tension and helping water penetrate the hardened stool.
  • Together, these actions soften the stool and lubricate the rectal wall, making passage easier and more comfortable.
  • The effect is localised — systemic absorption is minimal, which is why it's generally well tolerated.

Because the action is local rather than systemic, Micralax tends to work faster than oral laxatives. Most people experience a bowel movement within 5 to 15 minutes of use.

 

Who Should Use Micralax Micro Enema?

 

Micralax is suitable for adults and children over 3 years of age who are experiencing constipation. It's particularly useful when you need reliable, prompt relief — for example, before a medical procedure, when oral laxatives haven't worked, or when constipation is causing significant discomfort. That said, it's not a long-term solution. Persistent constipation should always be investigated by a GP.

  • Adults experiencing occasional or short-term constipation
  • Children over 3 years (under medical or pharmacist guidance)
  • People who find oral laxatives slow or ineffective
  • Those needing bowel clearance before a procedure or examination

 

How Does Micralax Compare to Other Constipation Treatments?

 

Feature Micralax Micro Enema Oral Laxative (e.g. Lactulose)
Onset of action 5–15 minutes 24–48 hours
Route Rectal Oral
Systemic absorption Minimal Variable
Suitable for children over 3 Yes Depends on product

 

Is Micralax Micro Enema Safe to Store at Home?

 

Yes. Each tube is sealed and single-use, so there's no risk of contamination between uses. Store the pack below 25°C, away from direct sunlight, and keep it out of reach of children. The tubes have a shelf life printed on the outer packaging — always check this before use. Because each tube is pre-measured, there's no guesswork involved, which makes this micro enema for constipation a convenient option to have on hand. For broader digestive health support, browse our constipation collection for additional products.

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.

Micralax Micro Enema (Pack of 12) specifications
Treatment category Constipation relief
Mechanism of action Osmotic softening and lubrication of faecal mass in the rectum
Effective Within 5–15 minutes
Suitable for Adults and children over 3 years
Active ingredient Sodium citrate 450 mg, sodium lauryl sulphoacetate 45 mg, sorbic acid 5 mg
Pack sizes 12 single-dose tubes
Strengths 5 ml per tube
UK classification General Sale List (GSL)
Drug class Osmotic laxative / rectal preparation
Preparation Rectal solution
Route of administration Rectal

Specifications of Micralax Micro Enema (Pack of 12)

 

What Is Micralax Micro Enema and What Is It Used For?

 

Micralax Micro Enema is a rectal solution used to treat constipation in adults and children over 3 years of age. It contains sodium citrate, sodium lauryl sulphoacetate, and sorbic acid in a 5 ml single-dose tube. The solution is administered rectally and works locally in the lower bowel to soften hardened stools and stimulate a bowel movement, usually within 5 to 15 minutes. It is available over the counter without a prescription and is classified as a General Sale List (GSL) medicine in the UK. The NHS describes constipation as passing fewer than three stools per week, or stools that are hard, dry, and difficult to pass — Micralax is designed to address exactly this.

 

What Do You Need to Know Before Using Micralax Micro Enema?

 

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

  • You have rectal bleeding or unexplained rectal pain
  • You have been diagnosed with inflammatory bowel disease (such as Crohn's disease or ulcerative colitis)
  • You have a known hypersensitivity to any of the ingredients
  • You are using it in children under 3 years of age without medical supervision
  • You have had recent rectal or bowel surgery

Speak to your GP or pharmacist before use if you are pregnant, breastfeeding, or have any chronic bowel condition. Regarding drug interactions, no significant interactions with other medicines have been identified for Micralax, as systemic absorption is minimal. However, always inform your pharmacist of all medicines you are taking.

  • No clinically significant drug interactions currently documented
  • Systemic absorption is negligible, reducing interaction risk

 

How Should You Use Micralax Micro Enema?

 

Using Micralax correctly ensures both safety and effectiveness. Follow these steps carefully:

  1. Wash your hands thoroughly before handling the tube.
  2. Twist off the protective seal from the nozzle tip.
  3. Squeeze a small drop of solution onto the nozzle to lubricate it.
  4. Lie on your side with your knees drawn up towards your chest, or adopt another comfortable position.
  5. Gently insert the nozzle into the rectum — adults: full length; children: half length only.
  6. Squeeze the tube firmly to deliver the entire contents.
  7. Withdraw the nozzle while still squeezing to prevent the solution being drawn back in.
  8. Remain in position for a few moments, then proceed to the toilet when you feel the urge.
Indication Age Group Dose Frequency
Constipation Adults and children over 3 years One 5 ml tube (full contents) Once as required; do not exceed one dose per day without medical advice
Constipation (children) 3–12 years One 5 ml tube (insert nozzle to half length only) Once as required; seek pharmacist advice before repeat use

If you are also experiencing symptoms such as bloating or cramping alongside constipation, it may be worth exploring our indigestion collection for complementary support.

 

What Are the Possible Side Effects of Micralax Micro Enema?

 

Micralax is generally well tolerated. Side effects are uncommon, but as with any medicine, some people may experience a reaction. If you notice rectal bleeding, severe pain, or signs of an allergic reaction (such as swelling, rash, or difficulty breathing), stop use immediately and seek medical attention.

Common side effects:

  • Mild rectal irritation at the site of insertion
  • Brief, transient burning sensation

Less common side effects:

  • Localised discomfort or a feeling of urgency
  • Skin sensitivity around the rectal area

If side effects persist or concern you, speak to your pharmacist or GP. You can also report suspected side effects to the MHRA via the Yellow Card scheme at yellowcard.mhra.gov.uk.

 

How Should You Store Micralax Micro Enema?

 

Correct storage helps maintain the product's integrity and safety. Follow these guidelines:

  • Store below 25°C in a cool, dry place
  • Keep away from direct sunlight and heat sources
  • Keep out of the sight and reach of children
  • Do not use after the expiry date printed on the packaging
  • Each tube is single-use only — discard after use, even if not fully emptied
  • Do not store in the bathroom or near a sink where humidity is high

For other digestive health products and related treatments, you can also browse our haemorrhoids and piles collection, as constipation and haemorrhoids are often linked conditions.

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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 Micralax Micro Enema online in the UK?

You can buy Micralax Micro Enema (Pack of 12) directly from Cured Pharmacy, a GPhC-registered UK online pharmacy. No prescription is required as it is a General Sale List medicine. Simply add it to your basket and it will be dispatched to your door.

How does Micralax Micro Enema work in the body?

Micralax works locally in the rectum rather than throughout the whole digestive system. Sodium citrate releases water bound within the stool, while sodium lauryl sulphoacetate reduces surface tension to help water penetrate the hardened faecal mass. This softens the stool and lubricates the rectal wall, making it easier to pass — usually within 5 to 15 minutes.

How do I use Micralax Micro Enema step by step?

Twist off the nozzle seal, squeeze a small drop onto the tip to lubricate it, then lie on your side with knees drawn up. Insert the nozzle gently into the rectum (full length for adults, half length for children), squeeze the tube to deliver the full contents, and withdraw while still squeezing. Most people feel the urge to use the toilet within 5 to 15 minutes.

How quickly does Micralax Micro Enema work?

Micralax typically produces a bowel movement within 5 to 15 minutes of administration. This makes it one of the faster-acting options available without a prescription. Individual response times may vary slightly depending on the severity of constipation.

What is the correct dose of Micralax Micro Enema for adults?

The standard adult dose is one 5 ml tube, used rectally as a single dose. You should not use more than one tube per day unless directed by a healthcare professional. If constipation does not resolve after one dose, speak to your pharmacist or GP before repeating.

Is Micralax Micro Enema suitable for children?

Micralax can be used in children over 3 years of age. For children, insert the nozzle to half its length only, rather than the full length used for adults. Always consult a pharmacist or GP before using any rectal preparation in a child, and do not use in children under 3 years without medical supervision.

Can I use Micralax Micro Enema during pregnancy?

Pregnant women should consult their GP or midwife before using Micralax. While rectal laxatives are generally considered lower risk than stimulant oral laxatives during pregnancy, professional guidance is always recommended. The NHS advises that constipation in pregnancy is common and should be managed carefully.

What are the side effects of Micralax Micro Enema?

Side effects are uncommon but may include mild rectal irritation or a brief burning sensation at the insertion site. These are usually short-lived and resolve on their own. If you experience rectal bleeding, severe pain, or signs of an allergic reaction, stop use immediately and seek medical advice.

Who should not use Micralax Micro Enema?

Do not use Micralax if you have rectal bleeding, inflammatory bowel disease, or a known allergy to any of its ingredients. It should also be avoided after recent rectal or bowel surgery unless a doctor has advised otherwise. Always check with your pharmacist if you are unsure whether this product is right for you.

How long can you use Micralax Micro Enema for?

Micralax is intended for short-term use only and should not be used regularly without medical advice. If constipation persists beyond a few days despite treatment, you should speak to your GP to rule out an underlying cause. The NHS recommends addressing lifestyle factors such as diet and hydration as part of long-term constipation management.

What are the alternatives to Micralax Micro Enema?

Alternatives include oral laxatives such as lactulose (osmotic), senna (stimulant), or ispaghula husk (bulk-forming), as well as other rectal preparations like glycerol suppositories. The right choice depends on the cause and severity of your constipation. Browse our constipation collection to compare available options.

Can Micralax Micro Enema interact with other medicines?

No clinically significant drug interactions have been documented for Micralax, largely because systemic absorption of its active ingredients is minimal. However, it is always good practice to inform your pharmacist of all medicines you are currently taking, including supplements and herbal remedies, before starting any new treatment.

Is Micralax Micro Enema available on prescription in the UK?

Micralax is classified as a General Sale List (GSL) medicine in the UK, meaning it is available to buy without a prescription. It can be purchased from pharmacies and registered online pharmacies like Cured Pharmacy. In some cases, a GP may prescribe it as part of a bowel management plan.

What should I do if Micralax Micro Enema does not work?

If you do not experience a bowel movement within 30 minutes of using Micralax, do not use a second dose without speaking to a pharmacist or GP first. Persistent constipation that does not respond to treatment may indicate an underlying condition that requires investigation. Your GP can advise on further management options.

What are the latest findings on rectal laxatives like Micralax?

Rectal laxatives including sodium citrate-based micro enemas are well-established in clinical practice and continue to be recommended for short-term constipation relief in both adults and children. Current NHS and NICE guidance supports their use as part of a stepwise approach to constipation management. If you are also managing related gut symptoms, our IBS and cramps collection may offer additional support.

How Should You Use Micralax Micro Enema?

Using Micralax correctly is straightforward, but it's worth taking a moment to read the instructions before your first use. Proper technique ensures the full dose is delivered and reduces any discomfort during administration.

What Is the Correct Dose of Micralax Micro Enema?

The dose is the same for adults and children over 3 years — one 5 ml tube per occasion. The key difference between adults and children is the depth of nozzle insertion, not the volume of solution used. Do not use more than one tube per day without medical advice.

When Is the Best Time to Use Micralax Micro Enema?

There is no fixed time of day that is clinically required, but many people find it most convenient to use Micralax in the morning when the natural urge to defecate is often strongest. Using it when you have access to a toilet within 15 minutes is sensible, given how quickly it tends to work. Avoid using it immediately before travelling or when you won't have easy access to a bathroom.

How Long Can You Use Micralax Micro Enema For?

Micralax is designed for short-term, occasional use only. It is not intended as a daily or long-term treatment for constipation. If you find yourself needing it regularly, this may be a sign that your constipation has an underlying cause that needs addressing — whether dietary, lifestyle-related, or medical. The NHS recommends increasing fibre intake, staying well hydrated, and taking regular exercise as first-line measures for managing constipation. If symptoms persist for more than a few days despite treatment, speak to your GP.

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 Micralax Micro Enema?

Micralax is generally well tolerated, and most people use it without experiencing any notable side effects. Because it acts locally in the rectum with minimal systemic absorption, the risk of widespread effects is low. That said, some people do notice mild reactions at the site of administration.

  • Mild rectal irritation following insertion
  • A brief, transient burning or stinging sensation in the rectal area
  • A feeling of urgency or pressure shortly after administration

What Are the Less Common Side Effects of Micralax Micro Enema?

Less commonly, some individuals may experience localised discomfort that lasts a little longer than expected, or notice skin sensitivity around the rectal area after use. These effects are typically mild and self-limiting.

  • Prolonged localised discomfort or soreness
  • Skin sensitivity or redness around the anal area
  • Mild cramping or abdominal discomfort

What Are the Serious Side Effects of Micralax Micro Enema?

Serious side effects are rare but should not be ignored. Stop using Micralax immediately and seek urgent medical attention if you experience any of the following:

  • Rectal bleeding — this should always be investigated by a doctor
  • Severe or worsening rectal pain
  • Signs of an allergic reaction, including swelling of the face, lips, or throat, skin rash, or difficulty breathing
  • No bowel movement after 30 minutes — do not repeat the dose without medical advice

What Should You Do If You Experience Side Effects?

If you notice mild irritation or discomfort, this usually resolves on its own within a short time. You do not need to take any specific action for minor, transient effects. However, if side effects are persistent, severe, or concern you in any way, contact your pharmacist or GP for guidance. You can also report suspected side effects directly to the MHRA via the Yellow Card scheme at yellowcard.mhra.gov.uk — this helps improve medicine safety monitoring across the UK.

Can Micralax Micro Enema Interact With Other Medicines?

No clinically significant interactions between Micralax and other medicines have been identified. This is largely because the active ingredients are absorbed minimally into the bloodstream, meaning they are unlikely to affect or be affected by other drugs you may be taking. Nevertheless, it is always sensible to inform your pharmacist of your full medication list — including over-the-counter products, vitamins, and herbal supplements — before starting any new treatment. If you are taking medicines for bowel conditions or have been prescribed other laxatives, seek pharmacist advice before combining treatments.

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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