Hyospasmol is a medicine used to ease painful cramps caused by spasms of internal organs, especially in the stomach, intestines, bile ducts, and urinary tract. In simple terms, it helps relax muscles inside the body that have tightened suddenly and are causing discomfort. Many people in South Africa are familiar with it for short-term relief of abdominal cramping, including cramps linked to conditions like irritable bowel syndrome (IBS).
Quick facts
- Brand name: Hyospasmol
- Active ingredient: Hyoscine butylbromide
- Medicine group: Antispasmodic (anticholinergic/antimuscarinic)
- Main use: Short-term relief of painful spasms and cramps
- Forms available: Tablets and injection
- Use in children: Tablets generally from 6 years and older
- Continuous daily use: Not advised without medical assessment
What it is and what it is used for
Active ingredient and medicine class
Hyospasmol contains hyoscine butylbromide (international non-proprietary name: INN). This substance belongs to a group of medicines called antispasmodics. More specifically, it is an anticholinergic (antimuscarinic) medicine, which means it blocks certain nerve signals that cause muscles inside the body to tighten.
Hyoscine butylbromide is a single-ingredient medicine, meaning it only contains this active substance plus inactive ingredients (excipients) that help form the tablet or injection.
What Hyospasmol is used for
According to the source information, Hyospasmol is used to relieve pain and discomfort caused by involuntary muscle spasms of internal organs. These spasms most commonly affect:
- The gastrointestinal tract (stomach and intestines)
- The biliary tract (gallbladder and bile ducts)
- The urinary tract (including the bladder)
It is mainly used for acute or episodic cramping, not for ongoing daily treatment without a doctor checking the cause. Examples mentioned in the source include:
- Abdominal cramps
- Spasm-related pain linked to irritable bowel syndrome (IBS)
- Acute spasm conditions such as biliary colic or renal colic (often using the injectable form)
The medicine focuses on easing discomfort during flare-ups or sudden episodes rather than treating the underlying disease itself.
How it works
Inside your body, muscles in organs like the stomach and bladder are controlled by nerve signals. One of the main chemical messengers involved is called acetylcholine. When this messenger attaches to certain receptors, the muscle contracts.
Hyospasmol works by blocking these receptors, so the message telling the muscle to tighten does not get through. As a result:
- The muscle relaxes
- Spasms reduce
- Cramping pain eases
A helpful point is that hyoscine butylbromide mainly acts outside the brain and spinal cord. Because of its chemical structure, it does not easily enter the central nervous system. This is why its effects are focused on the organs and not strongly on the brain.
Who should NOT use this medicine
Some people must not use Hyospasmol because it can worsen certain medical conditions. Do not use this medicine if any of the following apply to you, unless a doctor specifically tells you to do so.
Do not use Hyospasmol if you have:
- Untreated narrow-angle glaucoma
- Myasthenia gravis (a condition causing muscle weakness)
- Paralytic ileus or obstructive ileus (a blockage or paralysis of the bowel)
- Mechanical narrowing of the gastrointestinal tract
- Megacolon
- Prostate enlargement (prostatic hypertrophy) with difficulty passing urine
- A known allergy or hypersensitivity to hyoscine butylbromide or any of the ingredients
If you are unsure whether one of these conditions applies to you, speak to a doctor or pharmacist before using Hyospasmol.
Warnings and precautions
Important safety points
- Short-term use only: Hyospasmol is not meant for continuous daily use without medical advice. If abdominal pain keeps coming back, the cause needs to be investigated.
- Unexplained severe pain: Seek medical help urgently if severe abdominal pain does not improve, or if it comes with fever, vomiting, or fainting.
- Heart effects: The medicine can increase heart rate. People who already have tachycardia (fast heartbeat) should use it with caution.
- Vision changes: Temporary blurred vision or difficulty focusing can occur. Be careful when driving or using machinery if this happens.
- Older adults: Older people may be more sensitive to anticholinergic side effects such as confusion or urinary retention.
Driving, machinery, and daily activities
Hyospasmol does not commonly cause strong drowsiness, but dizziness and visual disturbances are possible. If you feel affected, avoid driving, operating machinery, or doing tasks that need clear vision and concentration.
Pregnancy, planning pregnancy, and breastfeeding
Use of Hyospasmol during pregnancy and breastfeeding is not recommended according to the source information. This is a precaution because there is limited data available.
If you are pregnant, planning to become pregnant, or breastfeeding, speak to your doctor or pharmacist before using this medicine.
Interactions
Medicines and substances that may interact
Hyospasmol can interact with other products, mainly because of its anticholinergic action.
Possible interactions include:
- Other anticholinergic medicines: Using Hyospasmol together with medicines that have similar effects can increase side effects like dry mouth, blurred vision, and difficulty passing urine. Examples mentioned include:
- Certain antidepressants (tricyclic antidepressants)
- Some antihistamines
- Amantadine (used in Parkinson’s disease)
- Phenothiazines and butyrophenones
- Medicines affecting gut movement: Hyospasmol slows down stomach and intestinal movement, which may change how other oral medicines are absorbed.
- Alcohol and central nervous system depressants: Alcohol can increase the sedative effects of Hyospasmol.
Practical advice
Always tell your doctor or pharmacist about all medicines, supplements, and herbal products you are using before starting Hyospasmol.
How to take (Step-by-step)
General guidance
Hyospasmol is available as oral tablets and as an injection. The form used depends on the situation and medical advice.
Oral tablets
- Swallow tablets whole with water.
- They can be taken with or without food.
- Use only for short periods unless a healthcare professional advises otherwise.
Injection
- Given into a vein (slow IV), muscle (IM), or under the skin (SC).
- IV injections must be given slowly.
- This form is usually used in medical settings, not for routine home use.
Adult dosing (tablets)
- Typical dose: 10 mg to 20 mg per dose
- Frequency: Up to 3 to 5 times daily as needed
- Maximum daily dose: Up to 80 mg for some indications
Adult dosing (injection)
- Typical dose: 20 mg per dose (one ampoule)
- May be repeated after 30 minutes
- Maximum daily dose: 100 mg
Children
- Children 6 to 11 years: Oral tablets at 10 mg, three times daily
- Children under 6 years: Not recommended (safety and effectiveness not established)
- The injectable form is generally not recommended for routine use in children.
Older adults
No specific dose adjustment is established, but caution is advised due to sensitivity to side effects.
Missed dose
Not specified in the source.
Overdose
If too much Hyospasmol is taken, symptoms may include:
- Fast heartbeat
- Dry mouth
- Difficulty passing urine
- Flushed skin
- Temporary vision problems
Severe cases may involve breathing problems, severe neurological symptoms, or loss of consciousness. Seek immediate medical attention if an overdose is suspected.
Dosing table
| Age group | Form | Dose | Frequency | Maximum daily dose |
|---|---|---|---|---|
| Adults | Tablet | 10–20 mg | Up to 3–5 times daily | Up to 80 mg |
| Adults | Injection | 20 mg | Repeat after 30 minutes if needed | 100 mg |
| Children 6–11 years | Tablet | 10 mg | 3 times daily | Not specified |
| Children under 6 years | Any | Not recommended | – | – |
Possible side effects Hyospasmol
Side effects are mainly linked to the anticholinergic action of the medicine. Not everyone will experience them.
Common or uncommon side effects
- Dry mouth
- Constipation
- Dizziness
- Increased heart rate (tachycardia)
- Sweating changes
- Skin reactions such as urticaria (hives)
Less common or rare side effects
- Difficulty passing urine (urinary retention)
Serious side effects — seek urgent help
- Severe allergic reactions such as anaphylaxis or angioedema (swelling of the face, lips, tongue, or throat)
- Severe drop in blood pressure, especially after injection
- Breathing difficulties
If you notice any worrying symptoms, stop using the medicine and get medical help immediately.
Storage and disposal
Storage
- Tablets: No special storage conditions required. Keep out of the sight and reach of children.
- Syrup: Store at or below 25 °C and protect from light.
- Injection (unopened): No special conditions required. Shelf-life is usually up to 5 years.
Once an injection ampoule is opened, it must be used immediately. Any unused portion should be discarded.
Disposal
Do not throw unused or expired medicine into household waste or wastewater. Ask your pharmacist how to dispose of medicines safely to protect the environment.
What the medicine contains
Hyospasmol contains hyoscine butylbromide as the active ingredient. It also includes excipients needed to make the tablet or solution.
The oral tablets are contraindicated in people with certain rare metabolic conditions such as hereditary fructose intolerance, due to excipient content.
Pack information and appearance
Hyoscine butylbromide is available as:
- 10 mg and 20 mg film-coated tablets
- Injection solution (20 mg/mL)
Further details about tablet colour, shape, or pack size are not specified in the source.
Practical FAQs
How quickly does Hyospasmol start working?
After taking a tablet, the highest levels in the blood are usually reached around 2 hours later.
Can it make me sleepy?
Strong drowsiness is not common, but dizziness and visual changes can occur.
Can older adults use it?
Yes, but with caution, as they may be more sensitive to side effects.
Can I drink alcohol while taking it?
Alcohol may increase sedative effects, so caution is advised.
Does it cause constipation or diarrhoea?
Constipation is listed as a common side effect. Diarrhoea is not commonly reported.
Is it habit-forming?
Not specified in the source.
Are there different tablet strengths?
Yes, tablets are available in 10 mg and 20 mg strengths.
Is there a generic version?
Yes. Hyoscine butylbromide is sold under various brand names.
Manish Sharma is a Master’s graduate in Pharmaceutical Chemistry and a registered pharmacist with a passion for simplifying medical knowledge for everyday readers. Through his platform, he provides clear, easy-to-understand information about medicines — including their correct usage, benefits, and safety tips — while also addressing common myths surrounding them.
Alongside modern medicine, Manish also explores natural and herbal remedies, encouraging a balanced and healthy lifestyle. His mission is to empower people with reliable health information, helping them make informed decisions and live healthier, happier lives.
