What is Dicyclomine: Uses, Warnings & Interactions

Updated Sep 2, 2025  •  Published Dec 30, 2020

Dicyclomine is a generic prescription drug for people with irritable bowel syndrome (IBS). It relieves abdominal pain and cramping by relaxing the muscles in the intestines. Doses are usually taken orally four times a day as a capsule, tablet, or oral solution.

Dicyclomine overview

BRAND NAMES:

  • No brand-name version available

Generic Names:

  • Dicyclomine HCl

Uses:

  • Relieves abdominal pain and cramping due to irritable bowel syndrome

Therapeutic Classes:

  • Anticholinergic, antispasmodic, gastrointestinal agent

Forms:

  • Capsule, tablet, oral solution (liquid), injection

How it’s taken:

  • By mouth or injection

What is Dicyclomine used for?

Dicyclomine relieves abdominal pain and cramping in people with irritable bowel syndrome.

What form(s) does Dicyclomine come in

  • Tablet

    • 20 mg

  • Capsule

    • 10 mg

  • Oral solution (liquid)

    • 10 mg/5 mL

  • Injection

    • 10 mg/mL

What are common Dicyclomine doses?

  • For irritable bowel syndrome: 20–80 mg taken by mouth four times daily

    • Injection: 10–20 mg IM injection four times daily for one to two days in people who cannot take the drug orally

Find more detailed information about dicyclomine dosage, forms, and strengths here.

Common Dicyclomine prescriptions

  • Dicyclomine HCl
    2ml of 10mg/ml ampule

  • Dicyclomine HCl
    473ml of 10mg/5ml bottle

  • Dicyclomine HCl
    10mg capsule

  • Dicyclomine HCl
    20mg tablet

  • Dicyclomine HCl
    2ml of 10mg/ml vial

How to take Dicyclomine

  • Take your medicine as directed. The dose may need to be changed several times at the beginning of therapy.

  • Doses can be taken with or without food.

  • Swallow tablets or capsules whole. Do not break, crush, or chew.

  • Measure the oral liquid medicine with a calibrated oral syringe or medicine measuring cup provided. Do not use tableware or kitchen measuring devices.

  • Take other medications at least one hour before taking a dose of dicyclomine.

    • Do not take antacids at the same time as dicyclomine.

  • Store dicyclomine at room temperature protected from heat.

What to do if you miss a dose of Dicyclomine

  • Take a dose as soon as you remember. 

  • If it is almost time for the next dose, wait until then and take a regular dose. 

  • Do not take extra medicine to make up for a missed dose.

Dicyclomine contraindications

  • This medicine is not right for everyone.

  • Dicyclomine is contraindicated in:

    • Anyone who is actively bleeding and may be unstable

    • Women who are breastfeeding

    • Children younger than 6 months old

  • Do not use dicyclomine if you have had an allergic reaction to dicyclomine, are breastfeeding, or if you have:

Dicyclomine warnings

  • Make sure healthcare professionals treating you are aware that you are taking dicyclomine.

  • Because of possible side effects, make sure to keep all appointments with the prescriber.

  • Before taking dicyclomine, tell the prescriber if you are pregnant, breastfeeding, or have:

    • Heart or blood vessel problems

    • High blood pressure

    • Liver problems

    • Kidney problems

    • Digestive system problems, especially ulcerative colitis, blockage, hiatal hernia, or diarrhea

    • Overactive thyroid

    • Enlarged prostate

    • Autonomic neuropathy

    • Fever

  • The prescriber also needs to know if you’ve had certain intestinal surgeries, particularly:

    • An ileostomy

    • A colostomy

  • This medicine may make you sweat less, making you vulnerable to overheating.

    • Avoid hot places.

    • Stay indoors when it is hot outside.

    • Be cautious when exercising. 

  • This medicine can cause drowsiness, dizziness, or blurred vision. Avoid driving, using machines, or doing any other risky activity until you know how dicyclomine affects you.

  • Your eyes may be more sensitive to bright light while you are using this medicine. You may want to wear sunglasses in bright sunlight.

Dicyclomine interactions

  • To avoid possible drug interactions, tell the prescribing healthcare provider about all the prescription drugs, over-the-counter medicines, and supplements regularly taken before starting dicyclomine, particularly:

    • Other anticholinergic drugs, including certain types of asthma medications

    • Drugs that treat glaucoma

    • Drugs that treat diarrhea

    • Drugs that treat constipation

    • Drugs that speed up stomach emptying

    • Antipsychotics

    • Drugs that cause constipation, such as opioids

    • Drugs that make you urinate called thiazide diuretics

    • Antihistamines

    • Potassium supplements or potassium-containing drugs

    • Digoxin

  • Antacids should be taken at least two hours before a dicyclomine dose.

Find more detailed information about dicyclomine interactions to avoid here.

Dicyclomine side effects

Serious side effects

Talk to a healthcare provider if you notice any signs or symptoms of a possible serious side effect, including:

  • Racing heartbeats, irregular heartbeats

  • Severe dizziness, lightheadedness, fatigue, weak pulse, low blood pressure

  • Restlessness, agitation, confusion, disorientation, hallucinations, delirium

  • Difficulty breathing, stopped breathing

  • Allergic reaction: Itching, hives, swelling of the face, mouth, or throat, trouble breathing, trouble swallowing, throat tightness, fast or slow pulse, lightheadedness

Less serious side effects

  • Dizziness

  • Dry mouth

  • Blurred vision

  • Nausea

  • Drowsiness

  • Weakness

  • Nervousness

Sources:

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