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Bells Liquid Paraffin BP - 150ml

Bells Liquid Paraffin BP - 150ml

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  • ✔️ Lubricates and softens stools for easier, strain-free passage
  • ✔️ Gentle laxative action — no bowel cramping or urgency
  • ✔️ Works within 6–8 hours for reliable overnight relief
  • ✔️ Suitable for adults and children over 3 years
  • ✔️ Single-ingredient BP-grade formula for consistent quality

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Is Bells Liquid Paraffin BP Right for Your Constipation?

 

Constipation is something most people experience at some point — and it can be genuinely uncomfortable. Bells Liquid Paraffin BP 150ml is a well-established, over-the-counter oral laxative that has been used in the UK for decades to provide gentle, reliable relief. If you've been struggling with infrequent or difficult bowel movements, liquid paraffin constipation treatment may be a straightforward option worth considering. You can browse our full range of constipation remedies to compare your options before deciding.

Liquid Paraffin BP is a British Pharmacopoeia-grade mineral oil. The "BP" designation means it meets the quality standards set out in the British Pharmacopoeia, giving you confidence that what's in the bottle is exactly what it says on the label. At £7.49 for 150ml, it's an accessible choice for short-term constipation relief.

 

How Does Bells Liquid Paraffin BP Work as a Laxative?

 

Liquid paraffin is classified as a lubricant laxative. Rather than stimulating the bowel muscles or drawing water into the gut, it works by physically coating the stool and the intestinal wall. This makes the passage of stools smoother and less effortful. Here's a simple breakdown of the mechanism:

  • Liquid paraffin is swallowed orally and passes through the digestive tract largely unabsorbed.
  • It coats the surface of the stool with a thin oily film, reducing friction between the stool and the bowel wall.
  • It also softens the stool itself by penetrating and lubricating its outer layers.
  • The result is a bowel movement that typically occurs within 6–8 hours of taking the dose.

Because it works mechanically rather than chemically, it doesn't cause the cramping that some stimulant laxatives can produce. That said, it's still intended for short-term use only.

 

Who Is Bells Liquid Paraffin BP Suitable For?

 

This product is suitable for adults and children over 3 years of age who are experiencing occasional constipation. It's particularly useful when straining needs to be avoided — for example, after certain surgical procedures or when haemorrhoids make passing stools painful. If you're also dealing with discomfort related to haemorrhoids, you might find our haemorrhoids and piles range helpful alongside this product.

Bells Liquid Paraffin BP may be suitable if you:

  • Are an adult experiencing short-term, occasional constipation.
  • Need a laxative that doesn't cause bowel cramping or urgency.
  • Are looking for a simple, single-ingredient oral laxative.
  • Have been advised by a healthcare professional to use a lubricant laxative.

 

How Does Liquid Paraffin Compare to Other Laxative Types?

 

Feature Bells Liquid Paraffin BP Lactulose (Osmotic Laxative)
Mechanism Lubricates and softens stool Draws water into the bowel
Onset of action 6–8 hours 24–48 hours
Risk of cramping Low Moderate (bloating common)
Suitable for children over 3? Yes (with care) Yes

 

How Should You Store Bells Liquid Paraffin BP?

 

Store Bells Liquid Paraffin BP below 25°C, away from direct sunlight and heat sources. Keep the bottle tightly closed when not in use, and always store it out of the reach and sight of children. Do not use the product after the expiry date printed on the bottle.

Using liquid paraffin constipation treatment correctly also means checking the bottle for any visible changes in appearance before each use. If the liquid looks cloudy or has changed colour, do not use it and contact your pharmacist for advice.

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.

Bells Liquid Paraffin BP 150ml specifications
Treatment category Constipation relief
Mechanism of action Lubricant laxative — coats and softens stool
Effective for Short-term relief of occasional constipation
Suitable for Adults and children over 3 years
Active ingredient Liquid Paraffin BP
Pack size 150ml
UK classification General Sale List (GSL)
Drug class Lubricant laxative
Preparation Oral liquid
Route of administration Oral

Specifications of Bells Liquid Paraffin BP 150ml

 

What Is Bells Liquid Paraffin BP and What Is It Used For?

 

Bells Liquid Paraffin BP is an oral lubricant laxative containing Liquid Paraffin BP as its sole active ingredient. It is used for the short-term relief of occasional constipation in adults and children over 3 years of age. Constipation is generally defined as having fewer than three bowel movements per week, or passing stools that are hard, dry, and difficult to expel. Liquid paraffin works by lubricating the bowel and softening the stool, making it easier to pass without straining.

It is not a treatment for the underlying cause of constipation. If your symptoms persist for more than a week, or if you notice blood in your stools, unexplained weight loss, or a significant change in your bowel habits, you should speak to your GP promptly.

 

What Do You Need to Know Before Using Bells Liquid Paraffin BP?

 

Before using this product, read the following carefully. There are certain situations where liquid paraffin should not be used, and others where extra caution is needed.

Do not use Bells Liquid Paraffin BP if you:

  • Are allergic to liquid paraffin or any other ingredient in the product.
  • Are a child under 3 years of age.
  • Are elderly and have difficulty swallowing, as there is a risk of aspiration (inhaling the liquid into the lungs), which can cause a serious condition called lipoid pneumonia.
  • Are pregnant — liquid paraffin is generally not recommended during pregnancy without medical advice.
  • Have abdominal pain, nausea, or vomiting of unknown cause.
  • Have a bowel obstruction or any condition that causes difficulty swallowing.

Potential drug interactions to be aware of:

  • Fat-soluble vitamins (A, D, E, and K) — prolonged use of liquid paraffin may reduce their absorption from food and supplements.
  • Anticoagulants such as warfarin — reduced vitamin K absorption could theoretically affect anticoagulant control; speak to your GP or pharmacist if you take blood thinners.

 

How Should You Use Bells Liquid Paraffin BP?

 

Always use this product exactly as directed on the label or as advised by your pharmacist. Do not exceed the recommended dose. If you are unsure, ask your pharmacist before use. If you're managing a digestive condition alongside constipation, you may also find our IBS and cramps range useful.

  1. Shake the bottle gently before use.
  2. Measure the correct dose using a medicine spoon or oral syringe — do not estimate.
  3. Take the dose orally, ideally at bedtime on an empty stomach or at least two hours after a meal.
  4. Do not lie down immediately after taking the dose, as this increases the risk of aspiration.
  5. Drink a full glass of water after taking the dose.
Age Group Dose Frequency
Adults and children over 12 15–30ml Once daily at night
Children 3–12 years 5–15ml Once daily at night (under medical supervision)
Children under 3 years Not recommended

 

What Are the Possible Side Effects of Bells Liquid Paraffin BP?

 

Like all medicines, Bells Liquid Paraffin BP can cause side effects, although not everyone experiences them. Knowing what to look out for helps you use the product safely.

Common side effects:

  • Anal seepage of paraffin oil, which may cause soiling of underwear.
  • Skin irritation or itching around the anal area due to oil leakage.
  • Mild abdominal discomfort.

Less common side effects:

  • Lipoid pneumonia — a rare but serious condition caused by aspiration of the oil into the lungs. Risk is higher in elderly patients or those with swallowing difficulties.
  • Reduced absorption of fat-soluble vitamins (A, D, E, K) with prolonged use.
  • Foreign body granulomas in the intestinal wall with very long-term use.

Stop using the product and seek medical advice if you experience chest pain, a persistent cough, or difficulty breathing after taking it.

 

How Should You Store Bells Liquid Paraffin BP?

 

Correct storage helps maintain the quality and safety of the product. You can also explore our indigestion range for related digestive health products, all stored and dispatched under the same pharmacy standards.

  • Store below 25°C in a cool, dry place.
  • Keep away from direct sunlight and heat sources.
  • Keep the bottle tightly closed after each use.
  • Store out of the reach and sight of children.
  • Do not use after the expiry date printed on the bottle.
  • Do not dispose of medicines via wastewater or household waste — return unused product to your pharmacy.

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 Bells Liquid Paraffin BP online in the UK?

You can buy Bells Liquid Paraffin BP 150ml directly from Cured Pharmacy, a GPhC-registered UK online pharmacy. It is available without a prescription as a General Sale List medicine. Simply add it to your basket and it will be dispatched to your door.

How does liquid paraffin work in the body?

Liquid paraffin is a lubricant laxative that passes through the digestive tract largely unabsorbed. It coats the surface of the stool with a thin oily film, reducing friction and softening the stool so it passes more easily. It does not stimulate bowel contractions, which is why it tends to cause less cramping than stimulant laxatives.

How do I use Bells Liquid Paraffin BP step by step?

Shake the bottle, measure your dose carefully using a medicine spoon or oral syringe, and take it orally — ideally at bedtime on an empty stomach. Follow with a full glass of water, and avoid lying down immediately after taking it to reduce the risk of aspiration. Do not exceed the recommended dose.

What is the correct dose of liquid paraffin for adults?

The standard adult dose is 15–30ml taken once daily, usually at night. For children aged 3–12 years, the dose is typically 5–15ml under medical supervision. Children under 3 years should not use this product.

How long does Bells Liquid Paraffin BP take to work?

Bells Liquid Paraffin BP typically produces a bowel movement within 6–8 hours of taking a dose, which is why it is usually taken at bedtime. Individual results may vary depending on the severity of constipation and other dietary factors. If there is no effect after 24 hours, speak to your pharmacist.

What is the best time to take liquid paraffin?

The best time to take liquid paraffin is at bedtime, on an empty stomach or at least two hours after your last meal. Taking it at night means the laxative effect is likely to occur in the morning, which is more convenient for most people. Avoid taking it immediately before lying down flat.

What are the side effects of Bells Liquid Paraffin BP and how do I manage them?

The most common side effect is anal seepage of paraffin oil, which can cause skin irritation around the anal area — using a barrier cream can help manage this. In rare cases, aspiration of the oil can cause lipoid pneumonia, particularly in elderly patients or those with swallowing difficulties. If you experience chest pain, persistent cough, or breathing difficulties, stop use and seek medical advice immediately.

Who should not use Bells Liquid Paraffin BP?

This product is not suitable for children under 3 years, pregnant women, elderly patients with swallowing difficulties, or anyone with a bowel obstruction or unexplained abdominal pain. People who take anticoagulants such as warfarin should speak to their GP before use, as prolonged use may affect vitamin K absorption. Always read the label before use.

Can I use liquid paraffin during pregnancy?

Liquid paraffin is generally not recommended during pregnancy because prolonged use may reduce the absorption of fat-soluble vitamins that are important for foetal development. If you are pregnant and experiencing constipation, speak to your midwife or GP before using any laxative. There are other options, such as dietary changes and bulk-forming laxatives, that may be more appropriate.

How long can you use liquid paraffin for constipation?

Liquid paraffin is intended for short-term use only — generally no longer than one week without medical advice. Prolonged use can reduce the absorption of fat-soluble vitamins A, D, E, and K, and may cause other complications. If constipation persists beyond a week, consult your GP to identify any underlying cause.

What happens if I miss a dose of Bells Liquid Paraffin BP?

If you forget to take a dose, simply take it the following night as normal — do not double up to make up for a missed dose. Because this product is used for short-term relief rather than as a daily maintenance medicine, missing one dose is unlikely to cause any harm. Continue with your normal dosing schedule.

What are the alternatives to liquid paraffin for constipation?

There are several alternatives available depending on the type and cause of your constipation. Bulk-forming laxatives such as ispaghula husk (Fybogel) are often recommended as a first-line option, while osmotic laxatives like lactulose draw water into the bowel to soften stools. You can explore the full range of options in our constipation collection.

Can liquid paraffin interact with other medicines?

Yes, prolonged use of liquid paraffin can reduce the absorption of fat-soluble vitamins (A, D, E, and K), which may in turn affect the action of anticoagulants such as warfarin that depend on vitamin K levels. If you take any regular medicines, speak to your pharmacist before starting liquid paraffin. Short-term use at recommended doses is unlikely to cause clinically significant interactions for most people.

Is Bells Liquid Paraffin BP suitable for children?

Bells Liquid Paraffin BP can be used in children aged 3 years and over, but only under medical supervision and at a reduced dose of 5–15ml. It should never be given to children under 3 years. If your child is constipated, it is always best to speak to your GP or pharmacist before using any laxative — you may also find our baby and toddler range helpful for younger children's health needs.

What does the latest research say about liquid paraffin as a laxative?

Liquid paraffin has been used as a lubricant laxative for many decades and remains listed in the British National Formulary (BNF) for short-term constipation relief. Current clinical guidance generally favours bulk-forming and osmotic laxatives as first-line treatments due to a more favourable safety profile with long-term use. Liquid paraffin remains a useful option for short-term use when other laxatives are not suitable, but should not be used routinely without medical advice.

How Should You Use Bells Liquid Paraffin BP?

Bells Liquid Paraffin BP is taken orally as a liquid. Always measure your dose carefully — never estimate — and follow the steps below to use it safely and effectively.

Do not take more than the recommended dose. If you are unsure about how to use this product, speak to your pharmacist before starting.

What Is the Correct Dose of Bells Liquid Paraffin BP?

The dose varies depending on age. Always use the lowest effective dose for the shortest time necessary. The table below summarises the recommended doses.

Do not exceed 30ml in a single dose for adults. If you are giving this product to a child, always seek advice from a GP or pharmacist first.

When Is the Best Time to Use Bells Liquid Paraffin BP?

The best time to take Bells Liquid Paraffin BP is at bedtime, ideally on an empty stomach or at least two hours after your last meal. Taking it at night means the laxative effect — which typically occurs within 6–8 hours — is likely to happen in the morning when it is most convenient. Avoid taking it immediately before lying down flat, as this increases the risk of the liquid being aspirated into the lungs.

Do not take it with meals, as food may reduce its effectiveness and increase the risk of oil seepage.

How Long Can You Use Bells Liquid Paraffin BP For?

Bells Liquid Paraffin BP is intended for short-term use only. It should not be used for more than one week without seeking medical advice. Prolonged use can reduce the absorption of fat-soluble vitamins A, D, E, and K, and may cause other complications including intestinal granulomas with very long-term use.

If your constipation does not improve within a week, or if it returns frequently, speak to your GP. Recurrent constipation may have an underlying cause that needs investigation, such as a dietary issue, medication side effect, or bowel condition.

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 Bells Liquid Paraffin BP?

The most frequently reported side effect of liquid paraffin is anal seepage of the oil, which can occur particularly if the dose is too high or if the product is taken too frequently. This can cause soiling of underwear and skin irritation around the anal area. Applying a gentle barrier cream to the perianal skin can help manage this discomfort.

  • Anal seepage of paraffin oil
  • Perianal skin irritation or itching
  • Mild abdominal discomfort or bloating
  • Oily stools

What Are the Less Common Side Effects of Bells Liquid Paraffin BP?

Less common side effects are generally associated with prolonged use or misuse of the product. These are unlikely to occur when the product is used correctly at the recommended dose for a short period.

  • Reduced absorption of fat-soluble vitamins A, D, E, and K with prolonged use
  • Foreign body granulomas in the intestinal wall (associated with very long-term use)
  • Nausea

What Are the Serious Side Effects of Bells Liquid Paraffin BP?

The most serious risk associated with liquid paraffin is lipoid pneumonia, a condition caused by aspiration of the oil into the lungs. This is most likely to occur in elderly patients, those with swallowing difficulties, or anyone who lies down immediately after taking the dose. Although rare, it is a potentially serious complication and is one of the main reasons this product is not recommended for elderly patients with dysphagia.

Seek immediate medical attention if you experience any of the following after taking liquid paraffin:

  • Chest pain or tightness
  • Persistent or new cough
  • Shortness of breath or difficulty breathing
  • Fever following use

What Should You Do If You Experience Side Effects of Bells Liquid Paraffin BP?

If you experience mild side effects such as anal seepage or skin irritation, try reducing the dose and ensure you are not taking the product more frequently than recommended. For perianal irritation, a simple barrier cream can provide relief. If side effects are persistent or troublesome, stop using the product and speak to your pharmacist, who can suggest an alternative laxative that may suit you better.

For any serious side effects — particularly respiratory symptoms — stop use immediately and seek urgent medical advice. You can also report suspected side effects to the MHRA via the Yellow Card scheme at yellowcard.mhra.gov.uk.

Can Bells Liquid Paraffin BP Interact With Other Medicines?

Yes. Prolonged use of liquid paraffin can impair the absorption of fat-soluble vitamins A, D, E, and K from the gut. This is clinically relevant for patients taking anticoagulants such as warfarin, where reduced vitamin K absorption could affect INR control. If you take warfarin or any other anticoagulant, speak to your GP or pharmacist before using liquid paraffin. Short-term use at the recommended dose is unlikely to cause significant interactions for most people, but it is always worth checking if you take regular medicines.

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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