Dicyclomine is a carboxylic acid derivative and a selective anticholinergic with antispasmodic activity. Dicyclomine blocks acetylcholine from binding to muscarinic receptors on smooth muscle. This agent has a direct relaxing effect on smooth muscle and therefore prevents spasms in the muscles of the gastrointestinal tract, inhibits gastrointestinal propulsive motility, decreases gastric acid secretion and controls excessive pharyngeal, tracheal and bronchial secretion.

Uses

Dicyclomine is used to treat a certain type of intestinal problem called irritable bowel syndrome. It helps to reduce the symptoms of stomach and intestinal cramping. This medication works by slowing the natural movements of the gut and by relaxing the muscles in the stomach and intestines. Dicyclomine belongs to a class of drugs known as anticholinergics/antispasmodics.

This medication must not be used in children younger than 6 months old because of the risk of serious side effects.

How to use Dicyclomine

Take this medication by mouth with or without food as directed by your doctor, usually 4 times a day. To reduce your risk of side effects, your doctor may direct you to start this medication at a low dose and gradually increase your dose. Follow your doctor's instructions carefully.

If you are using the liquid form of this medication, carefully measure the dose using a special measuring device/spoon. Do not use a household spoon because you may not get the correct dose. Mix the dose of liquid with an equal amount of water before taking it.

Antacids lower the absorption of dicyclomine. Do not take this medication at the same time as antacids. If you are taking an antacid, take it after meals and take dicyclomine before meals.

The dosage is based on your age, medical condition, and response to treatment.

Side Effects

Dizziness, drowsiness, lightheadedness, weakness, blurred vision, dry eyes, dry mouth, nausea, constipation, and abdominal bloating may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.

To relieve dry mouth, suck (sugarless) hard candy or ice chips, chew (sugarless) gum, drink water, or use a saliva substitute. To relieve dry eyes, consult your pharmacist for artificial tears or other eye lubricants.

To prevent constipation, eat dietary fiber, drink enough water, and exercise. You may also need to take a laxative. Ask your pharmacist which type of laxative is right for you.

Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

Interaction

Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.

Some products that may interact with this drug include: potassium tablets/capsules, drugs that are affected by slowed gut movement (such as pramlintide).

Dicyclomine may affect the absorption of other products such as levodopa, certain azole anti-fungal drugs (ketoconazole, itraconazole), slowly-dissolving forms of digoxin, among others. If you are taking either ketoconazole or itraconazole, take it at least 2 hours before dicyclomine.