Pinaverium belongs to the class of medications called gastrointestinal calcium antagonists. This medication is used to treat irritable bowel syndrome (IBS). It helps relieve the symptoms of abdominal pain, bowel disturbances, and intestinal discomfort. It acts by relaxing the smooth muscle of the bowel. Pinaverium is also used to help relieve symptoms caused by certain disorders of the gallbladder associated with secretion of bile. How should I use this medication? The usual starting adult dose of pinaverium is 50 mg, taken 3 times a day with a glass of water during meals or snacks. Your doctor may increase the dose to 100 mg 3 times daily if adequate relief is not obtained with the lower dose. The tablet should not be swallowed when lying down or just before bedtime. The recommended maximum (total) daily dose of pinaverium is 300 mg. The length of treatment with this medication depends on the reason for use. Swallow this medication whole. Do not suck or chew the tablets. Many things can affect the dose of a medication that a person needs, such as body weight, other medical conditions, and other medications. If your doctor has recommended a dose different from the ones listed here, do not change the way that you are taking the medication without consulting your doctor. It is important to take this medication exactly as prescribed by your doctor. If you miss a dose, take it as soon as possible and continue with your regular schedule. If it is almost time for your next dose, skip the missed dose and continue with your regular dosing schedule. Do not take a double dose to make up for a missed one. If you are not sure what to do after missing a dose, contact your doctor or pharmacist for advice.