Buscopan is available over the counter in the UK, Australia, Canada, and many other countries, but it is not approved for human use in the United States. Where it is sold OTC, you can buy it at pharmacies without a prescription under names like Buscopan IBS Relief or Buscopan Cramps. In the US, the only FDA-approved form of hyoscine butylbromide (the active ingredient) is a veterinary injection for horses.
Where You Can Buy It Without a Prescription
In the UK, Buscopan is widely stocked in pharmacies and even some supermarkets. Two versions are commonly available: Buscopan Cramps, for general stomach cramping, and Buscopan IBS Relief, specifically marketed for irritable bowel syndrome symptoms. Both contain the same active ingredient at the same strength (10 mg of hyoscine butylbromide per tablet) and work the same way. The IBS version is labeled for people who already have an IBS diagnosis from a doctor.
Australia, Germany, and much of Europe also sell Buscopan over the counter. If you’re in the US and looking for a similar antispasmodic, you won’t find Buscopan on pharmacy shelves. Some people order it from international pharmacies, though availability and legality vary. Your pharmacist can suggest alternative options for abdominal cramping that are available domestically.
What Buscopan Treats
Buscopan relaxes the smooth muscle lining your gut, biliary tract, and urinary tract. It works by blocking signals at nerve junctions in the walls of these organs, which stops the muscle from contracting into painful spasms. The result is relief from the cramping, squeezing pain that comes with conditions like IBS, period pain in the abdomen, and general stomach cramps.
It does not treat the underlying cause of the pain. It targets the muscle spasm itself, so it’s most useful when your discomfort comes from your gut clenching rather than from inflammation or infection.
Dosage for Adults
Each tablet contains 10 mg of hyoscine butylbromide. The standard dose for adults and children 12 and older is one tablet three times a day. If that isn’t enough, you can increase to two tablets four times a day. Swallow them whole with water. You can take them with or without food, though taking them before meals may help if your cramps tend to flare around eating.
Who Should Not Take It
Buscopan is off-limits if you have a type of glaucoma called acute angle-closure glaucoma, because it can raise pressure inside the eye. It’s also unsuitable for people with myasthenia gravis (a condition causing progressive muscle weakness), a severely enlarged or blocked bowel, or paralytic ileus, where the gut has stopped moving entirely.
A longer list of conditions warrants a conversation with a pharmacist before buying. These include an enlarged prostate causing difficulty urinating, a very fast heart rate or other heart problems, an overactive thyroid, ulcerative colitis, severe constipation, and heartburn or acid reflux. If you’re 40 or older and experiencing new abdominal symptoms for the first time, it’s worth getting those symptoms assessed rather than self-treating.
Safety data during pregnancy is limited, so it’s generally not recommended for pregnant women. Small amounts likely pass into breast milk, but absorption by the baby appears to be low. If you’re breastfeeding and need occasional relief, it’s considered relatively low-risk, though other options may be preferable for regular use.
Common Side Effects
The most frequent side effects, affecting more than 1 in 100 people, are dry mouth, constipation, and blurred vision. All three stem from the same anticholinergic action that makes the drug work: blocking nerve signals that control muscle contractions also affects saliva production, bowel motility, and the muscles that focus your eyes. These effects are typically mild and wear off as the drug leaves your system. Sipping water and chewing sugar-free gum can help with dry mouth.
Medications That Interact With Buscopan
Because Buscopan has anticholinergic properties, combining it with other anticholinergic drugs amplifies side effects like dry mouth, blurred vision, and constipation. Common culprits include antihistamines for allergies, certain antidepressants like amitriptyline, some antipsychotics, and inhaled asthma medications such as ipratropium and tiotropium.
Avoid taking it alongside motion sickness drugs like metoclopramide or domperidone. These medications speed up gut movement, while Buscopan slows it down, so they cancel each other out. Similarly, don’t stack Buscopan with other IBS remedies that work the same way. You won’t get extra relief, just a higher chance of side effects.
Heart medications like quinidine and disopyramide also interact. If you take any regular prescriptions, a quick check with your pharmacist at the counter is the easiest way to confirm there’s no conflict before you buy.