Peppermint oil

What Is peppermint oil?

Peppermint oil is a natural remedy made from the peppermint plant. It’s known for its cooling, calming effect and is commonly used to relieve digestive discomfort. It’s usually taken in capsule form, under brand names like Colpermin, Mintec, Apercap, ColoPep, PepperMin, and Colomint. It’s available on prescription or over the counter[1].  

What is peppermint oil used to treat?

Peppermint oil is mainly used to treat irritable bowel syndrome (IBS) symptoms, such as[1]: 

• Stomach cramps 

• Bloating 

• Flatulence (excess wind) 

It works by relaxing the bowel muscles, easing spasms and discomfort. 

How does peppermint oil work?

Peppermint oil contains menthol, which[1]: 

• Relaxes smooth muscles in the gut 

• Helps relieve bloating and trapped wind 

• Reduces painful cramping 

This makes it useful for people with IBS or other digestive issues. 

Who can take peppermint oil?

Most adults and children over 15 years old can take peppermint oil. However, it’s not suitable for[1]: 

• Children under 15 

• People with allergies to peppermint or menthol or any other ingredients listed as part of the medication 

Take special care and speak to your doctor before taking if you have the following: 

• Difficulty peeing or pain when peeing 

• Blood in your stool 

• Abnormal vaginal discharge or bleeding 

• Pregnant or breastfeeding (unless advised by a doctor) 

• Severe constipation 

• Suffering from nausea or vomiting 

• Lost your appetite or weight 

• Recently travelled abroad 

Please tell your doctor or pharmacist about any conditions you may have or medication you take before you start treatment, and always follow the instructions in the Patient Information Leaflet[2].  

What’s a typical dosage of peppermint oil?

A typical dose of peppermint oil consists of 1 capsule, 3 times a day, which can increase to 2 capsules if needed[1]. 

How do you take peppermint oil?

You should[1]: 

• Swallow whole with water 

• Take 30-60 minutes before eating, not after 

• Do not chew or crush the capsules 

• Not take indigestion remedies 2 hours before or after you take this medicine 

Can you stop taking peppermint oil?

Yes – once your symptoms improve, you can stop taking peppermint oil. It’s not intended for long-term use unless your doctor advises otherwise[1].  

What if you take too much peppermint oil?

Taking too much peppermint oil can cause[1]: 

• Abdominal pain 

• Severe nausea or vomiting 

• Vertigo 

• Difficulty balancing, speaking or swallowing 

• Drowsiness 

Call a doctor or nearest emergency department or NHS 111 if you’ve taken more than the recommended dose. 

What if you forget a dose of peppermint oil?

If you miss a dose[1]: 

• Take it as soon as you remember 

• If it’s nearly time for your next dose, skip the missed one 

• Do not double up 

Medicines you can and can’t take with peppermint oil

Peppermint oil can interact with[1]: 

• Antacids (e.g. gaviscon), indigestion or reflux meds (such as omeprazole/lansoprazole or famotidine) as they may cause the capsule to dissolve too quickly 

• Always inform your doctor or pharmacist about all medications and supplements you take before you start a new medicine, and follow the instructions in the Patient Information Leaflet[2]. 

What are the side effects of peppermint oil?

Common side effects include[1]: 

• Heartburn or acid reflux 

• Nausea 

• Burning sensation in the mouth  

• Anal irritation  

• Allergic reactions (rash, itching, swelling) 

You should contact your GP if you experience any of these symptoms. In rare cases, the medicine may cause a serious allergic reaction (anaphylaxis). You should call 999 or visit A&E immediately if you believe this is happening[1]. 

Symptoms of anaphylaxis include:

• Difficulty breathing

• Tightness in throat and chest

• Swelling of the tongue or throat

• Feeling faint or dizzy

• Blue/grey skin or lips

If you experience any side effects, including those not listed, you are encouraged to report them via the Yellow Card Scheme or contact your doctor, pharmacist, or nurse. This information is intended as a summary for general awareness and does not replace professional medical advice. 

The information provided in the side effects section is not a comprehensive list of all possible side effects associated with this medication. For a complete list of side effects, please refer to the Patient Information Leaflet (PIL) provided with your medication or consult your healthcare professional[2]. 

Frequently asked questions about peppermint oil

Can I take peppermint oil long-term? 
Not usually. It’s best for short-term use – see a doctor if symptoms continue[1]. 

Can I take peppermint oil with food? 
No. Take it before meals, not with or after food[1]. 

Is peppermint oil safe during pregnancy? 
Not unless recommended by a healthcare provider or doctor[1]. 

Can I drink peppermint tea instead? 
Peppermint tea may help mild symptoms, but it’s not as strong or effective as the capsules[1]. 

For the official NHS guide for peppermint oil, visit their website.