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Dicyclomine

Medication antispasmodic digestive
Aka: dicycloverine, Bentyl
Brands seen in Singapore: Veragel-DMS, Colimix
Not medical advice. Check with your doctor or pharmacist before you start, stop or change the timing of anything you take.
How to use
What it’s for
Gut spasm and cramping pain, including in IBS
When to take
SG veragel label: 1 hour after meals and at bedtime
Take with
Water · SG colimix syrup is measured, not spooned
Pros & cons
Pros
  • FDA: an antispasmodic and antimuscarinic for IBS
  • SG labels: both products are pharmacy-only, not rx
  • SG colimix label: also used for wind and trapped gas
Cons
  • FDA: dizziness, dry mouth, blurred vision, drowsiness
  • FDA: contraindicated in glaucoma and myasthenia gravis
  • FDA: contraindicated if breastfeeding or under 6 months
Sources
  1. HSA — Listing of Registered Therapeutic Products (data.gov.sg open dataset, 5,511 rows, cached locally at /tmp/hsa_all.json and filtered locally, not re-fetched) · read 2026-08-27
    what it says
    “Both registered dicyclomine products carry Forensicclassification 'Pharmacy Only' — SIN02547P VERAGEL-DMS TABLET (aluminium hydroxide-magnesium carbonate 325 mg && dicyclomine HCl 2.5 mg && dimethicone 10 mg) · SIN03333P COLIMIX SYRUP (dicyclomine HCl 5 mg/5 ml && simethicone 50 mg/5 ml)”
  2. Singapore National Drug Formulary — VERAGEL-DMS TABLET [SIN02547P], Product Info and Indication · read 2026-08-27
    what it says
    “Forensic Classification PHARMACY ONLY MEDICINES … Indications: For the management and treatment of hyperacidity, gastritis and peptic ulcer.”
  3. Singapore National Drug Formulary — VERAGEL-DMS TABLET [SIN02547P], Dosage/Times of administration · read 2026-08-27
    what it says
    “1 to 2 tablets four times a day, to be taken 1 hour after meals and at bedtime or, as recommended by a doctor.”
  4. Singapore National Drug Formulary — COLIMIX SYRUP [SIN03333P], Indication and Contraindication · read 2026-08-27
    what it says
    “In older children and adults, Colimix is equally effective in relieving flatulence (wind) and abdominal discomfort due to entrapped gas … Dicyclomine is not recommended for use in infants under the age of six months.”
  5. Singapore National Drug Formulary — COLIMIX SYRUP [SIN03333P], Dosage · read 2026-08-27
    what it says
    “Adults: 10 ml 3 to 4 times daily and at bedtime … Children 4 to 12 years: 5 to 10 ml 4 times daily … Do not exceed the stated dose.”
  6. US FDA label for dicyclomine hydrochloride capsules USP, Indications and Usage, via openFDA drug/label.json (effective 2023-07-24) · read 2026-08-27
    what it says
    “Dicyclomine hydrochloride capsules, USP are an antispasmodic and anticholinergic (antimuscarinic) agent indicated for the treatment of functional bowel/irritable bowel syndrome”
  7. US FDA label for dicyclomine hydrochloride capsules USP, Dosage and Administration, via openFDA · read 2026-08-27
    what it says
    “Starting dose: 20 mg four times a day … the dose may be escalated to 40 mg four times a day … Documented safety data are not available for doses above 80 mg daily for periods longer than 2 weeks.”
  8. US FDA label for dicyclomine hydrochloride capsules USP, Contraindications, via openFDA · read 2026-08-27
    what it says
    “Dicyclomine hydrochloride is contraindicated in infants less than 6 months of age … nursing mothers … and in patients with: … myasthenia gravis … glaucoma … obstructive uropathy … obstructive disease of the gastrointestinal tract … severe ulcerative colitis”
  9. US FDA label for dicyclomine hydrochloride capsules USP, Adverse Reactions, via openFDA · read 2026-08-27
    what it says
    “The most serious adverse reactions include cardiovascular and central nervous system symptoms. The most common adverse reactions (> 5% of patients) are dizziness, dry mouth, vision blurred, nausea, somnolence, asthenia and nervousness”
  10. US FDA label for dicyclomine hydrochloride capsules USP, Drug Interactions, via openFDA · read 2026-08-27
    what it says
    “Antiglaucoma agents: anticholinergics antagonize antiglaucoma agents and may increase intraoccular pressure … Antacids: interfere with the absorption of anticholinergic agents … may antagonize the effects of drugs that alter gastrointestinal motility, such as metoclopramide”
  11. US FDA label for dicyclomine hydrochloride capsules USP, Use in Specific Populations, via openFDA · read 2026-08-27
    what it says
    “Pregnancy: use only if clearly needed … Pediatric Use: Safety and effectiveness not established … Hepatic and renal impairment: caution must be taken with patients with significantly impaired hepatic and renal function … Dicyclomine hydrochloride is excreted in human milk.”
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Updated 2026-08-29. Every line above traces to a numbered source. Kozen-X is not a medical device and does not give medical advice. It lists what published sources have written down — nothing more. A pair not listed is unrecorded, not cleared. Before you start, stop or re-time anything, talk to your doctor or pharmacist.