Dicyclomine%2525252525252525252525252525252525252525252525252520hydrochloride

# Dicyclomine Hydrochloride ## Overview Dicyclomine hydrochloride is an anticholinergic and antispasmodic medication used to relieve smooth muscle spasms, primarily in the gastrointestinal tract. ## Primary Indications * Irritable bowel syndrome (IBS) * Gastrointestinal (GI) spasms and cramping ## Adult Dosing * **Oral:** 20 mg four times daily. May be increased to 40 mg four times daily as needed, not to exceed 160 mg daily. * **Intramuscular:** 20 mg every 4-6 hours as needed. Dosing should not exceed 40 mg in any 24-hour period. ## Pediatric Dosing * **Oral:** Generally not recommended for infants under 6 months of age due to risk of serious adverse effects. For children 6 months and older, doses are typically lower than adult doses and depend on age and weight. Precise dosing should follow specific pediatric guidelines or physician recommendation. A common starting dose can be 5 mg three to four times daily, with increases based on response and tolerance. * **Intramuscular:** Not recommended for use in infants and children. ## Dose Adjustments No specific dose adjustments are typically required for hepatic or renal impairment, but caution is advised. ## Contraindications * **Infants less than 6 months of age:** Risk of respiratory depression, CNS depression, coma, and circulatory collapse. * **Hypersensitivity** to dicyclomine or any component of the formulation. * **Uncontrolled glaucoma.** * **Pyloric or duodenal obstruction.** * **Prostatic hypertrophy with urinary retention.** * **Myasthenia gravis.** * **Severe ulcerative colitis.** * **Intestinal atony or paralytic ileus.** * **Gastrointestinal obstruction.** * **Atony of the colon.** * **Cardiospasm.** * **Toxic megacolon.** ## Adverse Effects Common: Dry mouth, blurred vision, dizziness, drowsiness, nausea, constipation, urinary retention. Less common/Serious: Tachycardia, confusion, headache, nervousness, syncope, rash, increased sensitivity to light, impotence, decreased sweating (can lead to heatstroke). ## Key Drug Interactions * **Anticholinergics:** Additive anticholinergic effects (e.g., amantadine, some antihistamines, MAOIs, tricyclic antidepressants). * **CNS depressants:** Additive sedative effects (e.g., alcohol, benzodiazepines, opioids, some antihistamines). * **Potassium chloride:** Increased risk of gastrointestinal lesions with extended-release KCl formulations. ## Monitoring * Monitor for signs of effectiveness (reduction in spasms/cramping). * Monitor for anticholinergic adverse effects (dry mouth, blurred vision, urinary retention, constipation, confusion, tachycardia). * Monitor in infants younger than 6 months for respiratory depression and CNS effects. ## Clinical Pearls * Dicyclomine has significant anticholinergic properties, which can lead to a range of side effects, especially in the elderly and in infants. * Use with caution in patients with autonomic neuropathy, hepatic or renal disease, hyperthyroidism, coronary heart disease, congestive heart failure, or arrhythmias. * Intramuscular administration should be limited due to potential for severe adverse reactions. * Always verify the formulation (oral vs. injectable) and route of administration based on institutional protocol and patient status. *** **Disclaimer:** This information is intended for healthcare professionals. It is essential to consult the most current prescribing information and relevant literature for complete and up-to-date guidance before making any clinical decisions. Dosing and recommendations may vary based on individual patient factors and local guidelines.