Hyoscine Butylbromide: Effect on Abdominal Cramps & Its Limits

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At a Glance: Technical Data Sheet
How it works: why the tablet is different from the injection
Dosing: tablet, suppository, injection, combination
Taking it day to day
Side effects: rare with tablets, more frequent with injections
The limits: abdominal pain no antispasmodic should be left to deal with
Where hyoscine butylbromide helps — and where other medicines are better
Interactions and the anticholinergic sum
Comparison: antispasmodic, painkiller, combination product
Special cases: pregnancy, older age, glaucoma, heart
Hyoscine butylbromide experiences: what patients really ask
FAQ: Common questions about hyoscine butylbromide

1. At a Glance: Technical Data Sheet

Property	Details
Active ingredient	Hyoscine butylbromide (in Germany known as Butylscopolaminiumbromid, or butylscopolamine for short)
ATC code	A03BB01
Drug class	Antispasmodic (spasmolytic); peripherally acting anticholinergic (parasympatholytic)
Dosage forms	Coated tablets, suppositories, solution for injection; fixed combination with paracetamol as a film-coated tablet
Half-life	A few hours; what matters more is the very low absorption from tablets and suppositories
Maximum daily dose	Depends on the product: for tablets and suppositories the package leaflet gives a fixed upper limit; for the injection it is 100 mg daily according to the SmPC
Onset of effect	Injection into a vein: within a few minutes; tablets and suppositories: slower and considerably less pronounced
Prescription status	Tablets, suppositories and the paracetamol combination available without a prescription, but only from pharmacies; solution for injection prescription-only
Notable feature	Barely reaches the brain, so no typical central side effects; according to the SmPC, less than one per cent is absorbed from the gut

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This article is about the medicine. You will find an overview of the many possible causes in the article abdominal pain, and for the upper abdomen under stomach pain.

2. How it works: why the tablet is different from the injection

The stomach, bowel, bile ducts and ureters are surrounded by smooth muscle that contracts in waves and pushes the contents onwards. Among other things, it is controlled by the messenger substance acetylcholine. If this muscle cramps violently — during a stomach upset, for example, or when a stone blocks a duct — the typical wave-like, colicky pain results.

Hyoscine butylbromide blocks the docking sites for acetylcholine (muscarinic receptors) on these muscles. The muscle relaxes and the cramp eases.^¹ Chemically, the active ingredient is a derivative of scopolamine, but it carries an additional, electrically charged group. This small change has two big consequences:

Hardly any effect in the brain: The charged compound practically does not cross the blood-brain barrier. Confusion or drowsiness, as known from other anticholinergics such as oxybutynin, are therefore not typical.^¹
Hardly any absorption from the gut: According to the SmPC, less than one per cent of the active ingredient in tablets and suppositories reaches the blood.^¹ One suggestion is that it acts directly in the bowel wall, where it is present in high concentration. How strong this local effect is, is difficult to measure.

This leads to the most honest sentence in this article: the injection in the emergency department and the tablet from the pharmacy are not the same thing. Injected into a vein, hyoscine butylbromide works quickly and noticeably — with correspondingly more side effects. As a tablet, both the effect and the side effects are weaker. Studies, for example in irritable bowel syndrome, show a rather moderate effect of antispasmodics as a whole on abdominal pain.^²

An antispasmodic, not a painkiller in the strict sense. Hyoscine butylbromide only helps where a cramp in the muscle is causing the pain. It does not specifically work against inflammatory pain — such as appendicitis or gastritis —, against heartburn or against stretching pain caused by wind. So if you "feel nothing", it is not necessarily because you took too little; you may have a different problem.

3. Dosing: tablet, suppository, injection, combination

The figures below describe the approach given in the SmPC.^¹ They are not a dosing recommendation — for self-medication the pharmacy advises you; for recurrent symptoms the treating practice decides.

Tablets and suppositories: For adults and for children from the age stated in the package leaflet, a low single dose several times a day, with a fixed maximum daily amount. Suppositories are an option if tablets are hard to swallow.
Only short-term without medical advice: The package leaflets limit self-treatment to a few days. If cramps last longer or keep coming back, they need to be investigated, not treated with continuous use. The guide limits of self-medication gives you your bearings.
Injection: Given only by doctors — into a vein, a muscle or under the skin — for instance in the emergency department, for colic or before examinations such as an endoscopy of the stomach or bowel or an MRI scan, to stop the bowel moving for a short time.
Combination with paracetamol: Besides the antispasmodic, the fixed combination contains a full dose of paracetamol. Its maximum daily amount applies in full — all other products containing paracetamol count towards it (see section 9).

A common mistake: if the first tablet does not work, a second and a third are taken in quick succession. With an active ingredient that is barely absorbed anyway, this achieves little — but it does raise the risk of dry mouth and palpitations. A lack of effect is more likely a sign that the pain is not caused by a cramp.

4. Taking it day to day

When the cramp starts, not as a precaution. Hyoscine butylbromide is an as-needed medicine. Continuous use "for prevention" is not intended.
Swallow whole with water. The coated tablets are taken whole, the combination tablets as described in the package leaflet.
Briefly describe the pain. Where is it, does it come in waves, what came before it (food, stress, your period), is there fever, vomiting, diarrhoea? For a later assessment, this note is more valuable than any tablet. How to go about it is explained in the guide keeping a pain diary.
Take stock after a few doses. If the pain does not improve or gets worse, that is a reason to see a doctor — not to increase the dose.
Think about other anticholinergics. If you already take bladder medicines, certain antidepressants or older allergy medicines, the effects add up (section 8).

Do not drive yourself after an injection. After the injection, focusing on things close up can be impaired for a while, along with dizziness and a fast pulse. According to the SmPC, you should not drive or otherwise take part in road traffic until your vision is back to normal.^¹ After an examination with hyoscine butylbromide, arrange for someone to accompany you or use public transport; background under medications and driving.

When, where, how bad: your abdominal pain history

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5. Side effects: rare with tablets, more frequent with injections

The side effects follow directly from how it works: wherever acetylcholine switches something on in the body — saliva, heartbeat, near vision, bladder emptying, sweat — hyoscine butylbromide can put the brakes on. Because hardly any active ingredient reaches the blood from a tablet, these effects are rare with tablets. After an injection they occur more often and more markedly.^¹

Dry mouth and reduced sweating — usually harmless and temporary.
A fast pulse or even a racing heart — mainly after the injection; relevant in heart disease (section 10).
Blurred near vision and sensitivity to light due to dilated pupils — typically after the injection.
Dizziness and a drop in blood pressure — also mainly after the injection.
Urinary retention — the bladder empties less well, especially in men with an enlarged prostate.
Skin reactions and allergic reactions — from itching and rash to, very rarely, anaphylactic shock, mainly after the injection.

Emergency signs after taking it. Shortness of breath, swelling of the face or tongue and circulatory weakness can mean anaphylactic shock. Sudden severe eye pain with a red eye, worsening vision and nausea can be an acute glaucoma attack — a known danger of all anticholinergics in people prone to narrow-angle glaucoma. If you cannot pass urine despite a full bladder, that is urinary retention. In all these cases: get medical help immediately, and if in doubt call 112 (emergency number in Germany).

6. The limits: abdominal pain no antispasmodic should be left to deal with

This is the core of this article. For harmless cramps, hyoscine butylbromide is a sensible as-needed medicine. The real risk lies not in the active ingredient itself but in the fact that it gives you the feeling of having done something — while an illness that needs different treatment carries on.^³

Warning sign	What it suggests	What to do
Pain starts around the navel and moves to the lower right abdomen, with fever, nausea and pain on jolting	Appendicitis	Get examined by a doctor the same day
Severe pain in the upper right abdomen with fever or yellow skin	Inflamed gallbladder or bile ducts with gallstones	Promptly; with fever and yellowing, go to hospital straight away
Colic in the flank with fever or chills	A blocked, infected ureter with kidney stones	Emergency — go to hospital straight away
Bloated abdomen, vomiting, no more stools and no wind	Bowel obstruction	Emergency; antispasmodics are actually contraindicated here
Pressure or pain in the upper abdomen with shortness of breath, sweating, nausea, pain spreading to the arm or jaw	Heart attack — often atypical, particularly in women, older people and people with diabetes	Call 112 immediately
Blood in the stool or black, tarry stool	Bleeding in the gastrointestinal tract	Get it checked promptly; call 112 if you have circulatory problems
Pain in the lower left abdomen with fever, usually from middle age onwards	Diverticulitis	Medical examination
One-sided lower abdominal pain when pregnancy is possible, perhaps with bleeding	Ectopic pregnancy	Emergency — get medical help immediately

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The rigid abdomen. An abdomen that goes board-hard under light pressure, severe constant pain where every movement hurts, circulatory weakness or clouding of consciousness: these are signs of an acute abdomen. Do not try out tablets in that case — call 112 immediately. Blood in the stool with dizziness or persistent vomiting are not for self-treatment either.

Does hyoscine butylbromide mask appendicitis?

There is a widespread worry that any painkiller masks the diagnosis. According to current knowledge, it is not the relief that is dangerous — a medical examination usually recognises the typical signs even after pain treatment. What is dangerous is waiting: the second and third day on tablets, even though the pain is not easing or is shifting. Hyoscine butylbromide works against cramps, not against inflammation. If it does not help, that is information you should take seriously.

The rule of thumb

Wave-like, moderate cramps that you know in this or a similar form, while you otherwise feel well, and that fade within a day: a case for trying it yourself. New, severe, persistent or escalating pain, or pain with one of the warning signs above: a case for the doctor — with or without a tablet. The treatment decision then lies with the treating doctor.

7. Where hyoscine butylbromide helps — and where other medicines are better

Hyoscine butylbromide is recommended for many abdominal complaints. How well it is supported by evidence varies considerably from one to the next.

Complaint	Role of hyoscine butylbromide	What matters more
Cramps with a stomach bug	Justifiable for short-term relief	Replace fluids and salts; watch for warning signs
Irritable bowel syndrome with cramp-like pain	According to the guideline, antispasmodics are one possible option; the effect is rather moderate^²	Diet, stress management, peppermint oil as another antispasmodic, low-dose antidepressants if needed
Renal colic	No convincing added benefit alongside painkillers^⁴	Anti-inflammatory painkillers or metamizole
Biliary colic	Often given in addition in practice	The painkiller; recurrent colic needs investigating
Period pain	Widely used, but less well studied	Anti-inflammatory painkillers such as ibuprofen are better supported^⁵
Bloating and a feeling of fullness	Little effect, because the pain usually comes from stretching	Check your diet, get moving; with upper abdominal complaints, consider functional dyspepsia
Examinations (MRI, endoscopy) and palliative care	Established as an injection, for instance to keep the bowel still or to reduce rattling breathing	Used by doctors, not for self-medication

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Two points deserve a closer look. In irritable bowel syndrome, hyoscine butylbromide is one of several options against pain, but not a long-term solution for everyone: the guideline relies on a package of diet, exercise, psychosocial support and carefully selected medicines.^² If you regularly reach for antispasmodics, discuss it with the treating practice — not because it would be dangerous, but because better-suited approaches may be going unused.

In renal colic, studies have shown that adding an antispasmodic to a painkiller does not relieve the pain convincingly better.^⁴ Urological recommendations therefore rely on anti-inflammatory painkillers or metamizole. This is a good example of how a plausible mechanism — "the ureter is cramping, so relax it" — does not automatically translate into a benefit.

In period pain, anti-inflammatory painkillers act on the cause, the messenger substances formed in the lining of the womb. They are therefore better supported than antispasmodics.^⁵ If period pain is very severe or gets worse over the years, it is worth thinking of endometriosis.

8. Interactions and the anticholinergic sum

Most interactions of hyoscine butylbromide follow a simple logic: other medicines with a similar effect add up, those with an opposite effect cancel each other out.^¹ As a tablet, the effects are usually small because of the low absorption — after an injection or with a long list of medicines they can become noticeable.

Combination	Consequence	What to do
Tricyclic antidepressants such as amitriptyline	Increased anticholinergic effect: dry mouth, racing heart, urinary retention, constipation	Have the overall picture checked by a doctor
Bladder medicines such as oxybutynin or solifenacin	Similar effects add up	Mention the combination, watch for urinary retention and constipation
Older antihistamines, including those in non-prescription sleep aids and travel sickness remedies	Increased anticholinergic effects	Do not combine without realising it
Antipsychotics, amantadine, quinidine, disopyramide	Increased anticholinergic effects according to the SmPC	Agree with your doctor
Beta-agonists such as salbutamol	A stronger rise in pulse is possible	Watch out for a racing heart
Metoclopramide and other dopamine antagonists	Opposite effects on the gastrointestinal tract — each weakens the other	Question the combination
Loperamide	Both slow down bowel movement	Do not combine without seeking advice; with fever or bloody diarrhoea, do not self-treat anyway
Alcohol	No specific interaction known; but it irritates the stomach and bowel further	Avoid when you have abdominal complaints

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The decisive point is not the individual combination but the sum. Many medicines have a mild anticholinergic side effect that is hardly noticeable on its own. If hyoscine butylbromide is added — especially as an injection — a racing heart, constipation or urinary retention can result. The interaction check in the brite app shows which of your medicines work in the same direction. An up-to-date medication plan that you have with you when you need emergency care also helps.

9. Comparison: antispasmodic, painkiller, combination product

For abdominal pain, there are usually several medicines to choose from in the home medicine cabinet. They work in different ways and carry different risks.

Medicine	Principle	Strength	Points to note
Hyoscine butylbromide	Antispasmodic	Wave-like cramps	Weak as a tablet; anticholinergic contraindications
Hyoscine butylbromide with paracetamol	Antispasmodic plus painkiller	Cramps with a pain component	Paracetamol maximum daily amount, liver, alcohol
Metamizole	Painkiller with its own antispasmodic component	Colic, severe pain	Prescription-only; rare but dangerous change in the blood count
Ibuprofen and other NSAIDs	Anti-inflammatory painkiller	Period pain, renal colic	Stomach, kidneys, blood thinning; not for stomach pain "just in case"
Peppermint oil capsules	Herbal antispasmodic	Irritable bowel	Can make heartburn worse

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The paracetamol trap in the combination product. The fixed combination contains a full dose of paracetamol in every tablet. If you also take a cold or headache remedy, you will exceed the maximum daily amount sooner than you think — and paracetamol overdoses often damage the liver without early warning signs. Add up all products containing paracetamol, and avoid self-medication if you drink alcohol regularly or have liver disease. More in the painkiller comparison.

Which combination suits an individual case depends on the cause of the pain, any pre-existing conditions and the rest of your medication. With recurrent complaints, the decision is made by the treating practice.

10. Special cases: pregnancy, older age, glaucoma, heart

Contraindications

According to the SmPC, hyoscine butylbromide must not be used in conditions including untreated narrow-angle glaucoma, bowel obstruction or mechanical narrowing in the gastrointestinal tract, an abnormally dilated large bowel (megacolon), urinary retention due to a mechanical outflow obstruction, fast heart rhythm disorders and myasthenia gravis (a condition with muscle weakness that worsens with exertion).^¹ If you have known glaucoma, the type of glaucoma should be clarified before you take it.

Heart disease and the injection

After an injection, the pulse can rise markedly. In people with heart disease such as heart failure, coronary heart disease or rhythm disorders, serious complications have been described. The SmPC therefore requires particularly careful use and monitoring in these patients.^¹ Actively mention any heart condition before you are given an injection in the emergency department or before an examination.

Pregnancy and breastfeeding

According to the assessment by Embryotox (the Charité's advisory centre on medicines in pregnancy), no indications of an increased risk of malformations have emerged so far for hyoscine butylbromide; it can be used if an antispasmodic is really needed.^⁶ Abdominal pain during pregnancy should, however, always be assessed by a doctor before you reach for tablets. General rules in the guide medications during pregnancy.

Older people

Because hyoscine butylbromide barely reaches the brain, confusion is less of a concern than with other anticholinergics. The peripheral effects — constipation, urinary retention, a fast pulse — hit older people harder, though, especially if they already take several medicines with a similar effect. Abdominal pain in older age also more often takes an atypical course; a heart attack or a circulatory disorder of the bowel can initially feel like a stomach or bowel problem. More in the guide medications in old age.

Children

Age-dependent restrictions apply to children and are given in the package leaflet. Abdominal pain in children has many causes; with severe or persistent pain, fever or vomiting, the paediatric practice decides.

11. Hyoscine butylbromide experiences: what patients really ask

"In the emergency department the injection helped straight away, but the tablets at home hardly help at all. Why?"

Because they really are two different situations. Injected into a vein, hyoscine butylbromide reaches the muscles quickly and in an effective amount. As a tablet, only a very small proportion gets into the blood; a local effect in the bowel wall is discussed, but it is considerably weaker. On top of that, a painkiller is often given at the same time in the emergency department. The experience that "the injection works" therefore cannot be transferred to the tablet — and more tablets do not make up for it.

"I have irritable bowel and take it almost every day. Is that bad?"

With a confirmed diagnosis and no warning signs it is usually not dangerous, but it is not always sensible either. The package leaflet only provides for self-treatment for a short time, and taking it every day is a signal that the treatment should be rethought. The guideline on irritable bowel syndrome includes many building blocks — from changes in diet and peppermint oil to low-dose medicines that act on how pain is processed in the gut. Raise it with your practice, ideally bringing notes on when the cramps occur.

"My tummy has been hurting on the lower right since last night. Can I take hyoscine butylbromide for now?"

Caution is called for here. A new, persistent pain in the lower right abdomen — especially if it started around the navel, gets worse when jolted or comes with fever and nausea — can be appendicitis. An antispasmodic does not help against the inflammation. According to current knowledge, a tablet does not mask the diagnosis, but waiting can become dangerous. Get examined by a doctor today.

"I already take a bladder medicine. Can I still take hyoscine butylbromide?"

An occasional tablet is usually unproblematic because of the low absorption, but both medicines work in the same direction. Watch out for constipation, problems passing urine and palpitations, and mention the combination if you are given an injection at a practice or in hospital. If you take it regularly, the question belongs in your next medication review — with a complete list.

Which of your medicines work in the same direction?

The interaction check shows anticholinergic duplications and paracetamol totals at a glance.

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FAQ: Common questions about hyoscine butylbromide

How quickly does hyoscine butylbromide work?

As an injection into a vein it works within a few minutes. Tablets and suppositories work more slowly and considerably less strongly, because only a very small proportion of the active ingredient reaches the blood from the gut. If the pain does not improve after a few doses, the cause should be clarified by a doctor.

What kind of abdominal pain does hyoscine butylbromide help with?

It works against cramp-like, wave-like pain of the smooth muscle in the stomach, bowel, bile ducts and urinary tract. It does not specifically work against inflammatory pain, heartburn or stretching pain caused by wind. For renal colic and period pain, other painkillers are better supported.

When should I not treat abdominal pain myself?

With severe, new or increasing pain, fever, a rigid abdomen, persistent vomiting, blood in the stool, pain in the lower right abdomen, a possible pregnancy, or upper abdominal pain with shortness of breath and sweating. A medical examination is then needed; with circulatory problems or a suspected heart attack, call 112.

Does hyoscine butylbromide make you tired or confused?

As a rule no, because the active ingredient practically does not cross the blood-brain barrier. After an injection, however, blurred near vision, dizziness and a fast pulse can occur. You should not drive until your vision is back to normal.

Can I take hyoscine butylbromide if I have glaucoma?

In untreated narrow-angle glaucoma it is contraindicated according to the SmPC, because it can trigger an acute glaucoma attack. With well-treated open-angle glaucoma the situation is different, but it should be clarified with your ophthalmologist. Mention the diagnosis before every dose or injection.

What do I need to know about the combination product with paracetamol?

Every tablet contains a full dose of paracetamol. All other products containing paracetamol, such as cold or headache remedies, count towards the maximum daily amount. With liver disease or regular alcohol consumption, the combination product should not be taken without medical advice.

Can I take hyoscine butylbromide during pregnancy?

According to the assessment by Embryotox, there are so far no indications of an increased risk of malformations; it can be used if an antispasmodic is really needed. Abdominal pain during pregnancy should, however, always be assessed by a doctor before you reach for tablets. Discuss taking it with your practice.

Sources

Summary of Product Characteristics (SmPC) for hyoscine butylbromide (coated tablets, suppositories, solution for injection) and SmPC for the fixed combination with paracetamol (current version, available through the German medicines information system). pharmnet-bund.de
S3 guideline on irritable bowel syndrome (German Society for Gastroenterology, Digestive and Metabolic Diseases, DGVS, and German Society for Neurogastroenterology and Motility, DGNM, 2021) — German source. awmf.org
MSD Manual, Consumer Version: Abdominal pain — causes, warning signs and evaluation. Accessed 2026. msdmanuals.com
EAU Guidelines on Urolithiasis (European Association of Urology, 2025): pain management in renal colic. uroweb.org
Gesundheitsinformation.de (IQWiG): Period pain — what helps? Accessed 2026 — German source. gesundheitsinformation.de
Embryotox — German pharmacovigilance and advisory centre for embryonic toxicology (Charité Berlin): butylscopolamine. Accessed 2026. embryotox.de

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Medical disclaimer: This article is for general information and does not replace medical advice, diagnosis or treatment. Hyoscine butylbromide is an as-needed medicine for short-term, cramp-like complaints and is no substitute for a medical assessment. If you have severe, new or increasing abdominal pain, fever, a rigid abdomen, persistent vomiting, blood in your stool, pain during pregnancy or upper abdominal pain with shortness of breath and sweating, contact a doctor straight away or, in an emergency, call 112. Sudden eye pain with worsening vision, or urinary retention after taking it, needs immediate medical help. With the combination product, the paracetamol it contains counts towards the maximum daily amount. The choice of medicine and the dose are always set individually by the treating practice. Last updated: September 2026.