Butylscopolamine – Uses, Dosage & Side Effects
Butylscopolamine is an antispasmodic medication used to relieve abdominal and stomach cramps. It relaxes the smooth muscle of internal organs.
Things worth knowing about "Butylscopolamine"
Butylscopolamine is an antispasmodic medication used to relieve abdominal and stomach cramps. It relaxes the smooth muscle of internal organs.
What is Butylscopolamine?
Butylscopolamine (also known as scopolamine butylbromide or hyoscine butylbromide) is an anticholinergic drug with antispasmodic (spasmolytic) properties. It is primarily used to relieve painful cramps in the gastrointestinal tract, bile ducts, and urinary tract. It is widely sold under the brand name Buscopan and is available without a prescription in many countries. It is one of the most commonly used medications for abdominal cramps worldwide.
Indications – When is Butylscopolamine Used?
Butylscopolamine is indicated for the following conditions:
- Cramping abdominal pain (e.g., irritable bowel syndrome, gastritis)
- Biliary colic (spasms of the bile ducts)
- Renal colic (spasms of the urinary tract)
- Menstrual cramps (dysmenorrhea)
- Preparation for diagnostic procedures (e.g., endoscopy, imaging) to relax smooth muscle and improve visualisation
Mechanism of Action
Butylscopolamine acts as a muscarinic acetylcholine receptor antagonist. By blocking these receptors in the smooth muscle of the gastrointestinal, biliary, and urinary tracts, it prevents excessive muscle contractions, thereby relieving cramps and reducing pain.
Importantly, butylscopolamine has very limited ability to cross the blood-brain barrier, which means central nervous system side effects such as confusion or drowsiness are generally not observed. Its action is therefore largely confined to peripheral smooth muscle.
Dosage and Administration
Butylscopolamine is available in several formulations:
- Film-coated tablets: Typically 10 mg per tablet; the recommended adult dose is 10–20 mg up to 3–5 times daily
- Injectable solution: Administered intravenously or intramuscularly in clinical settings, especially for acute colic
- Suppositories: For patients who cannot take oral medications
The exact dosage should always be taken from the package insert or discussed with a doctor or pharmacist. Children under 6 years of age should only receive butylscopolamine under medical supervision.
Side Effects
Butylscopolamine is generally well tolerated. Possible side effects include:
- Dry mouth
- Visual disturbances (accommodation disorders, blurred vision)
- Increased intraocular pressure (especially in patients with narrow-angle glaucoma)
- Rapid heartbeat (tachycardia)
- Urinary retention (in patients with an enlarged prostate)
- Skin flushing and sensation of warmth
Contraindications
Butylscopolamine should not be used in patients with:
- Known hypersensitivity to the active substance
- Narrow-angle glaucoma
- Myasthenia gravis (a neuromuscular disorder causing muscle weakness)
- Megacolon (abnormal dilation of the colon)
- Severe prostatic hyperplasia with urinary retention
Drug Interactions
Butylscopolamine may enhance the anticholinergic effects of other medications, such as antihistamines, tricyclic antidepressants, and certain Parkinson's disease medications. Alcohol may also interact with the drug. Patients taking other medications should always consult their doctor or pharmacist before use.
References
- Rang, H.P. et al. – Rang and Dale's Pharmacology, 9th Edition, Elsevier, 2020.
- European Medicines Agency (EMA) – Product information on scopolamine butylbromide (Buscopan), available at: www.ema.europa.eu
- Ford, A.C. et al. – Efficacy of antispasmodics in irritable bowel syndrome: systematic review and meta-analysis. BMJ, 2008; 337:a2313. doi:10.1136/bmj.a2313
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