Hyoscine butylbromide
Also sold as: Buscopan
No prescription neededStomach cramps
Comes as:TabletInjection
Usual adult dose
Usual adult dose: 20 mg (two 10 mg tablets) up to 4 times a day for stomach or bowel cramps. Do not take more than 80 mg in 24 hours. Pain that lasts or is severe needs a doctor.
Your doctor may give you a different dose. Children's doses depend on weight.
Side effects
Common
- dry mouth
- constipation
- blurred vision
- fast heartbeat
Serious — get help
Stop taking it and see a doctor straight away if you notice:
- painful red eye with loss of vision (glaucoma)
- inability to pass urine
- severe allergic reaction
Do not take it, or take care, if
- Narrow-angle glaucoma
- Enlarged prostate or difficulty passing urine
- Bowel blockage or severe constipation
- Myasthenia gravis
- Fast heartbeat or heart disease (injection — use with caution)
Interactions
Medicines that can react with this one.
Moderate3 medicinesTake together only with care. Ask your doctor or pharmacist.
- Amitriptyline
Both have anticholinergic effects; more dry mouth, constipation and urine retention.
- Domperidone
They have opposite effects on the gut and can cancel each other out.
- Metoclopramide
They have opposite effects on the gut and can cancel each other out.