Irritable Bowel Syndrome

General review of IBS

Alosetron (lotronex®)

Drug Category: Selective 5-HT3 Receptor Antagonist. Indication: Treatment of women with severe diarrhea-predominant irritable bowel syndrome (IBS) who have failed to respond to conventional therapy

Dosing (Adults) IBS: Female: Oral: Initial: 0.5 mg twice daily for 4 weeks, with or without food; if tolerated, but response is inadequate, may be increased after 4 weeks to 1 mg twice daily. If response is inadequate after 4 weeks of 1 mg twice-daily dosing, discontinue treatment. Note: Discontinue immediately if constipation or signs/symptoms of ischemic colitis occur. Do not reinitiate in patients who develop ischemic colitis.

Renal Dosing: The need for dosage adjustment has not been defined (due to limited information on activity of metabolites).

Supplied: Tablet: 0.5 mg, 1 mg

Eluxadoline tablet - viberzi ™

Drug UPDATES: VIBERZI ™- eluxadoline tablet
[Drug information / PDF] Click link for the latest monograph
Dosing: Click (+) next to Dosage and Administration section (drug info link)

Initial U.S. Approval: 2015 [Controlled substance - schedule IV]

Mechanism of Action: Eluxadoline is a mu-opioid receptor agonist; eluxadoline is also a delta opioid receptor antagonist and a kappa opioid receptor agonist. The binding affinities (Ki) of eluxadoline for the human mu and delta opioid receptors are 1.8 nM and 430 nM, respectively. The binding affinity (Ki) of eluxadoline for the human kappa opioid receptor has not been determined; however, the Ki for guinea pig cerebellum kappa opioid receptor is 55 nM. In animals, eluxadoline interacts with opioid receptors in the gut.

INDICATIONS AND USAGE: VIBERZI is indicated in adults for the treatment of irritable bowel syndrome with diarrhea (IBS-D).

HOW SUPPLIED:
75 mg tablets: capsule-shaped tablets are coated in pale-yellow to light tan color debossed with "FX75" on one side. Each tablet contains 75 mg eluxadoline.
100 mg tablets: capsule-shaped tablets are coated in pink-orange to peach color debossed with "FX100" on one side. Each tablet contains 100 mg eluxadoline.

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Reference(s)

National Institutes of Health, U.S. National Library of Medicine, DailyMed Database.
Provides access to the latest drug monographs submitted to the Food and Drug Administration (FDA). Please review the latest applicable package insert for additional information and possible updates. A local search option of this data can be found here.