๐ Indications & Clinical Dosage
*Symptomatic relief of gastro-intestinal or genitourinary disorders characterized by smooth muscle spasm:*
Adults Children above 12 yrs: 20 mg 4 times a day
Children 6-11 yrs: 10 mg 3 times a day
*Irritable bowel syndrome:*
Adult: 10 mg 3 times a day; increased if necessary up to 20 mg 4 times a day
*Acute spasm, spasm in diagnostic procedures:*
BY IM INJ, OR BY SLOW IV INJ: Adult: 20 mg, then after 30 minutes 20 mg again if required, dose may be repeated more frequently in endoscopy; max. 100 mg per day
*Excessive respiratory secretions in palliative care:*
ORAL: Children 1 month-1 yr: 300-500 mcg/kg 3-4 times a day (max. per dose 5 mg); 2-4 yrs: 5 mg 3-4 times a day; 5-11 yrs: 10 mg 3-4 times a day; 12-17 yrs: 10-20 mg 3-4 times a day
BY IM INJ, OR BY IV INJ: Children 1 month-4 yrs: 300-500 mcg/kg 3-4 times a day (max. per dose 5 mg) 5-11 yrs: 5-10 mg 3-4 times a day 12-17 yrs: 10-20 mg 3-4 times a day
BY SC INJ: Adult: 20 mg every 4 hours if required, adjusted according to response to up to 20 mg every 1hour.
BY SC INF: Adult: 20-120 mg/24 hours
*Bowel colic (in palliative care):*
ORAL: Children 1 month-1 yr: 300-500 mcg/kg 3-4 times
a day (max. per dose 5 mg) 2-4 yrs: 5 mg 3-4 times a day 5-11 yrs: 10 mg 3-4 times a day 12-17 yrs: 10-20 mg 3-4 times a day
BY IM INJ, OR BY IV INJ: Children 1 month-4 yrs: 300-500 mcg/kg 3-4 times a day (max. per dose 5 mg) 5-11 yrs: 5-10 mg 3-4 times a day 12-17 yrs: 10-20 mg 3-4 times a day
BY SC INJ: Adult: 20 mg every 4 hours if required, adjusted according to response to up to 20 mg every 1hour.
BY SC INF: Adult: 60-300 mg/24 hours
*Transdermal Patch: For Motion sickness:*
Adults: 1 patch on hairless area of skin behind ear 5-6 hr before journey. If necessary, replace with new patch behind other ear after 72 hr.
Children above 10 yrs: Same as adults. Below 10 yr: Not recommended.
โ Contraindications
Myasthenia gravis (but may be used to decrease muscarinic side-effects of anticholinesterases), paralytic ileus, pyloric stenosis, toxic megacolon, and prostatic enlargement.
โ ๏ธ Precautions & Warnings
Downs syndrome, in children and in the elderly, gastro-esophageal reflux disease, diarrhoea, ulcerative colitis, autonomic, neuropathy, acute myocardial infarction, hypertension, conditions characterized by tachycardia (including hyperthyroidism, cardiac insufficiency, cardiac surgery), pyrexia, and in individuals susceptible to angle-closure glaucoma.
๐ Drug Interactions
Amantadine, atenolol, digoxin, phenothiazines, tricyclic antidepressants.
โ ๏ธ Adverse Reactions / Side Effects
Transient bradycardia (followed by tachycardia, palpitation and arrhythmias), reduced bronchial secretions, urinary urgency and retention, dilatation of the pupils with loss of accommodation, photo-phobia, dry mouth, flushing and dryness of the skin. Side-effects that occur occasionally include confusion (particularly in the elderly), constipation, nausea, vomiting, and giddiness. Very rare! , angle-closure glaucoma may occur.
๐คฐ Pregnancy & Lactation Safety
Pregnancy Risk:
Contraindicated
Lactation / Breastfeeding:
Caution advised
๐งช Compatibility & Storage Stability
Stability & Storage: Store at 15C-80C (59F-86F). Protect from light.
๐ Official Regulatory & Clinical References
- Drug Regulatory Authority of Pakistan (DRAP): Drug Registration, S.R.O. Price Gazettes & National Essential Medicines List (NEML).
- World Health Organization (WHO): Collaborating Centre for Drug Statistics Methodology (ATC/DDD Index).
- Formulary Standards: British National Formulary (BNF) & Pakistan National Formulary (PNF) guidelines.