Buscopan contains hyoscine butylbromide 10 mg, an antispasmodic. It relieves cramping from irritable bowel syndrome, period pain, and spasm in the gut, bladder and urinary tract. It relaxes smooth muscle rather than blocking pain, and barely enters the bloodstream.
What is Buscopan?
Buscopan contains hyoscine butylbromide 10 mg — hyoscine-N-butylbromide, also called scopolamine butylbromide. It is a Schedule 1 or 2 medicine depending on the pack, and the same ingredient is sold as Hyospasmol, Scopex and Spasmend.
It is an antimuscarinic antispasmodic. Smooth muscle — in the gut wall, the bile ducts, the bladder and the uterus — contracts in response to acetylcholine. Hyoscine butylbromide blocks those receptors, so the muscle relaxes and the painful spasm eases.
It is not a painkiller. It does not block pain signals or reduce inflammation. It relieves pain caused specifically by cramping, by stopping the cramp. For pain from any other cause it does nothing, which is why matching it to the right kind of pain matters.
One feature makes it notably well tolerated. The butylbromide part is a quaternary ammonium compound, which is electrically charged and therefore barely absorbed from the gut and effectively unable to cross into the brain. That is the important distinction from plain hyoscine hydrobromide, the travel-sickness medicine, which does enter the brain and causes marked drowsiness.
So Buscopan produces the antimuscarinic effects you would expect in the body — dry mouth, blurred vision — with very little drowsiness, and it is not a sedative.
What is Buscopan commonly used for?
- Irritable bowel syndrome (IBS), for cramping and abdominal spasm — its commonest use.
- Abdominal cramps from other causes, including gastroenteritis.
- Period pain (dysmenorrhoea), by relaxing uterine muscle.
- Renal colic — spasm from kidney stones — as an adjunct.
- Biliary colic, spasm in the bile ducts.
- Bladder spasm and urinary urgency in some cases.
- Before endoscopy or imaging, to relax the gut, given by injection.
For IBS, it is worth setting expectations. Buscopan helps the cramping component, and cramping is often the most distressing symptom — but IBS also involves bloating, urgency, and alternating constipation and diarrhoea, which an antispasmodic does not address. Identifying trigger foods, managing stress, and in some cases a low-FODMAP diet under dietitian guidance do more for the condition overall. Buscopan is a useful tool within that, not a treatment for the syndrome.
For period pain, an anti-inflammatory such as ibuprofen is usually more effective, because menstrual cramping is prostaglandin-driven and an NSAID targets that mechanism. Buscopan suits someone who cannot take NSAIDs, or can be used alongside one.
How Buscopan fits into this medicine category
| Group | Examples | What it does |
|---|---|---|
| Antimuscarinic antispasmodics | Hyoscine butylbromide (Buscopan, Hyospasmol, Scopex) | Relaxes smooth muscle spasm |
| Direct antispasmodics | Mebeverine (Bevispas) | Acts directly on gut muscle |
| Antispasmodic + anxiolytic | Librax | Spasm plus anxiety; contains a benzodiazepine |
| Antiemetics | Metoclopramide (Adco-Contromet) | Nausea and vomiting |
| Acid reducers | Pantoprazole (Praztek) | Reflux, gastritis, ulcers |
See the digestive, stomach and nausea medicines hub.
What to check before using Buscopan
Take it as needed for cramping, or regularly for a short period during a flare, following the pack instructions.
Speak to a pharmacist or doctor if:
- You have glaucoma, particularly narrow-angle. Antimuscarinics can raise pressure in the eye.
- You have an enlarged prostate or difficulty passing urine — the muscle relaxation can cause retention.
- You have myasthenia gravis.
- You have a bowel obstruction, paralytic ileus, or severe constipation.
- You have a fast or irregular heartbeat, or significant heart disease.
- You have ulcerative colitis, where antimuscarinics are used cautiously.
- You are pregnant or breastfeeding.
- You are older, where antimuscarinic effects including confusion are more likely.
- You take other antimuscarinic medicines — some antidepressants, antihistamines, bladder or Parkinson’s medicines. The effects add up.
Do not use it to push through undiagnosed abdominal pain. Relieving a cramp is appropriate once you know what is causing it. Masking new, severe or persistent abdominal pain delays diagnosis of things that need it.
Follow the pack instructions. This page does not set doses.
Possible cautions and when to ask a pharmacist or doctor
Dry mouth is the commonest effect, along with blurred vision, constipation and difficulty passing urine — all predictable consequences of blocking acetylcholine.
Little drowsiness, unlike travel-sickness hyoscine. It does not usually impair driving, though blurred vision can.
Report new abdominal symptoms rather than treating them. Weight loss you did not intend, bleeding from the bowel, black tarry stools, a change in bowel habit lasting more than a few weeks, waking at night with pain, a fever, or symptoms starting for the first time over the age of about 50 all need assessment. IBS is a diagnosis made after excluding other things, not one to assume.
Antimuscarinic effects add up in older adults, where confusion, falls and urinary retention are genuine risks if several such medicines are combined.
If cramping is not controlled, or you are using it most days, see a doctor rather than continuing indefinitely.
Seek medical attention for eye pain with blurred vision or halos around lights; inability to pass urine; severe or persistent abdominal pain; a swollen, tender abdomen; vomiting that will not stop; blood in the stool or black tarry stools; unexplained weight loss; fever with abdominal pain; or palpitations.
Related medicine guides
- Browse Digestive, Stomach & Nausea Medicines guides
- Read: Hyospasmol used for
- Read: Adco Contromet used for
Frequently asked questions
What is Buscopan 10 mg used for? Cramping and spasm — irritable bowel syndrome, abdominal cramps, period pain, and spasm in the bladder, bile ducts and urinary tract.
Is it a painkiller? No. It relaxes muscle spasm, and pain caused by that spasm eases as a result. It does nothing for pain from other causes.
Is it the same as Hyospasmol or Scopex? Yes — all contain hyoscine butylbromide. The brands differ.
Will it make me drowsy? Generally not. The butylbromide form barely enters the brain, unlike the hyoscine used for travel sickness.
Can I take it with a painkiller? Yes, they work differently and are often used together. For period pain, an anti-inflammatory is usually more effective and the two can be combined on advice.
Can I take it for stomach pain I have not had checked? Not as a routine. Relieving a known cramp is fine; masking new, severe or persistent abdominal pain delays diagnosis.