A peanut (arachis) oil enema to soften hard, impacted stools
Arachis oil enema
A peanut (arachis) oil retention enema used rectally to soften hard, impacted stools so they can pass.
What is Arachis oil enema?
An arachis oil enema is a rectal preparation that uses peanut (arachis) oil to soften hard, packed-down stools, a problem called faecal impaction, so they can be passed more easily. It is held in the back passage for a time, often overnight, to let the oil soak in and soften the stool, and it is frequently used before a stronger stimulant enema. The most important safety point is that, because it is made from peanut oil, it must be avoided by anyone with a peanut or soya allergy. It works only at the back passage, not throughout the body.
Education and reference only. This is a plain-language guide to Arachis oil enema — it deliberately contains no doses. Doses depend on the person, the brand and the reason for treatment, and belong with your prescriber. Always check the BNF, the product labelling (SmPC) and follow medical advice.
What it is
An arachis oil enema is a treatment given into the back passage (rectum) to soften hard, dried-out stools that have become packed down, a problem known as faecal impaction. Arachis oil is another name for peanut oil. The oil coats and soaks into the hard stool, making it softer and easier to pass. It is often used as a first step to soften an impacted stool, frequently overnight, before a stimulant enema or other measures are used to clear it. Because it is made from peanut oil, it is not suitable for anyone with a peanut or soya allergy.
How it works
When stool becomes hard and packed down in the lower bowel, it can be difficult and painful to pass. An arachis oil enema delivers peanut oil directly to the affected stool, where the oil lubricates and softens it from the outside in. Holding the enema in for a time, often overnight, lets the oil work so the stool becomes softer and easier to move. Because it acts only at the back passage rather than being absorbed and working through the body, its effect is local. It is commonly used as a softening step before a stimulant enema helps clear the bowel.
Company & origin
Originated / developed by: Generic manufacturers.
A rectal preparation used to soften hard, packed-down stools (faecal impaction) so they can be passed more easily.
Practical use
How to take Arachis oil enema
General, dose-free guidance — always follow your prescriber's and the leaflet's specific instructions.
- Use it rectally as directed, often warmed gently to body temperature for comfort.
- Hold it in for the time advised, frequently overnight, to let the oil soften the stool.
- Do not use it if you, or the person being treated, have a peanut or soya allergy.
- Expect it to be a softening step, sometimes followed by a stimulant enema to clear the stool.
- Follow the instructions on positioning and how long to retain it for the best effect.
Weighing it up
Advantages & disadvantages of Arachis oil enema
Advantages
- Softens hard, impacted stools so they can be passed more easily and comfortably.
- Works locally at the back passage without acting throughout the body.
- A useful first, softening step before a stimulant enema clears the bowel.
Disadvantages
- Must be avoided by anyone with a peanut allergy, and used with caution in soya allergy.
- Given rectally and usually needs to be held in for a time, often overnight.
- Softens the stool rather than strongly stimulating the bowel, so a further enema may be needed.
Practical use
Good to know
The single most important point is that an arachis oil enema is made from peanut (arachis) oil, so it must be avoided by anyone with a peanut allergy, and caution is also needed with soya allergy because of possible cross-reaction. It is used rectally, often by warming it gently to body temperature first for comfort, and is usually held in for a time such as overnight to give the oil a chance to soften the stool. It is frequently the first, softening step, with a stimulant enema used afterwards to help clear the impacted stool. It works only at the back passage, so it does not have effects around the rest of the body. If you are helping someone use one, gentle technique and following the instructions on positioning and how long to retain it make it more comfortable and effective.
Who should not take it / use with caution
- People with a peanut (arachis) allergy must not use it, as it is made from peanut oil.
- It is used with caution in people with a soya allergy because of possible cross-reaction.
- It is used with care in people with certain bowel problems, under medical guidance.
Monitoring
- Checking that the impacted stool softens and is passed.
- Confirming there is no peanut or soya allergy before use.
- Reviewing the cause of the constipation so it can be managed going forward.
Side effects
- Local irritation or discomfort at the back passage.
- Some leakage of oil, so a pad may be helpful.
- Rarely, an allergic reaction, particularly in anyone sensitive to peanut or soya.
Key interactions
- Few medicine interactions, as it works locally at the back passage.
- It is often used together with a stimulant enema as part of clearing impacted stool.
- Tell the person giving it about any peanut or soya allergy before use.
Available as: An oil enema given into the back passage.
Answers
Arachis oil enema: frequently asked questions
What is an arachis oil enema used for?
It is used to soften hard, packed-down stools (faecal impaction) so they can be passed more easily, often before a stimulant enema.
Why does peanut allergy matter?
Arachis oil is peanut oil, so anyone with a peanut allergy must not use it; caution is also needed with soya allergy because of possible cross-reaction.
How is it used?
It is given into the back passage, often warmed for comfort, and held in for a time such as overnight to let the oil soften the stool.
Does it work throughout the body?
No. It acts locally at the back passage to soften the stool there, so it does not have effects around the rest of the body.
Will it clear the stool on its own?
It softens the stool and is frequently the first step; a stimulant enema is often used afterwards to help clear an impacted stool.
The wider class
About Faecal softener enema (rectal)
Arachis oil enema belongs to the faecal softener enema (rectal) class. For how the class as a whole works, its shared safety principles and monitoring, see the full guide.
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Authoritative sources
- BNF
- NICE CKS
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