Loperamide Hcl

Name: Loperamide Hcl

Indications

IMODIUM® (loperamide hydrochloride) is indicated for the control and symptomatic relief of acute nonspecific diarrhea and of chronic diarrhea associated with inflammatory bowel disease. IMODIUM® (loperamide hcl) is also indicated for reducing the volume of discharge from ileostomies.

How supplied

Capsules - each capsule contains 2 mg of loperamide hydrochloride. The capsules have a light green body and a dark green cap with "JANSSEN" imprinted on one segment and "IMODIUM" on the other segment. IMODIUM® (loperamide hcl) capsules are supplied in bottles of 100.

NDC 50458-400-10.........(100 CAPSULES)

Store at 15°-25°C (59°-77°F).

Janssen Pharmaceutica Inc. Revised September 1996, July 1998. FDA Rev date: 10/21/2005

Clinical pharmacology

In vitro and animal studies show that IMODIUM® (loperamide hydrochloride) acts by slowing intestinal motility and by affecting water and electrolyte movement through the bowel. Loperamide binds to the opiate receptor in the gut wall. Consequently, it inhibits the release of acetylcholine and prostaglandins, thereby reducing peristalsis, and increasing intestinal transit time. Loperamide increases the tone of the anal sphincter, thereby reducing incontinence and urgency.

In man, IMODIUM® (loperamide hcl) prolongs the transit time of the intestinal contents. It reduces the daily fecal volume, increases the viscosity and bulk density, and diminishes the loss of fluid and electrolytes. Tolerance to the antidiarrheal effect has not been observed. Clinical studies have indicated that the apparent elimination half-life of loperamide in man is 10.8 hours with a range of 9.1 - 14.4 hours. Plasma levels of unchanged drug remain below 2 nanograms per mL after the intake of a 2mg capsule of IMODIUM® (loperamide hcl) . Plasma levels are highest approximately five hours after administration of the capsule and 2.5 hours after the liquid. The peak plasma levels of loperamide were similar for both formulations. Elimination of loperamide mainly occurs by oxidative N-demethylation. Cytochrome P450 (CYP450) isozymes, CYP2C8 and CYP3A4, are thought to play an important role in loperamide N-demethylation process since quercetin (CYP2C8 inhibitor) and ketoconazole (CYP3A4 inhibitor) significantly inhibited the N- demethylation process in vitro by 40% and 90%, respectively. In addition, CYP2B6 and CYP2D6 appear to play a minor role in loperamide N-demethylation. Excretion of the unchanged loperamide and its metabolites mainly occurs through the feces. In those patients in whom biochemical and hematological parameters were monitored during clinical trials, no trends toward abnormality during IMODIUM® (loperamide hcl) therapy were noted. Similarly, urinalyses, EKG and clinical ophthalmological examinations did not show trends toward abnormality.

Patient information

Patients should be advised to check with their physician if their diarrhea does not improve in 48 hours or if they note blood in their stools, develop a fever or develop abdominal distention.

Tiredness, dizziness, or drowsiness may occur in the setting of diarrheal syndromes treated with IMODIUM (loperamide hcl) . Therefore, it is advisable to use caution when driving a car or operating machinery. (see ADVERSE REACTIONS).

What is the most important information i should know about loperamide?

You should not use this medication if you are allergic to loperamide, or if you have stools that are bloody, black, or tarry, or if you have diarrhea that is caused by taking an antibiotic.

Before taking loperamide, tell your doctor if you have a fever, mucus in your stools, a history of liver disease, or if you are taking an antibiotic.

Drink plenty of liquids while you are taking loperamide.

It may take up to 48 hours before your symptoms improve. Keep using the medication as directed and tell your doctor if your symptoms do not improve after 10 days of treatment.

Loperamide may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be alert.

Where can i get more information?

Your pharmacist can provide more information about loperamide.

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

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