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alosetron Images

Generic Name: alosetron

Brand Names: Lotronex

There is an FDA Alert for this drug. Click here to view it.

    Ischemic Colitis and Constipation
  • Serious adverse GI effects reported, including ischemic colitis and serious complications of constipation, that have resulted in serious injury or death. (See Warnings under Cautions.)
  • Discontinue immediately and contact clinician if manifestations of constipation or ischemic colitis develop.
  • Do not resume alosetron in patients who develop ischemic colitis.
  • Contact clinician if constipation does not resolve after discontinuance of alosetron. If constipation resolves after discontinuance, resume therapy only on advice of clinician.
    Restricted Distribution Program
  • Voluntarily withdrawn from US market by manufacturer in November 2000 because of numerous reports of severe adverse effects, including ischemic colitis, severely obstructed or ruptured bowel, and death; FDA approved a supplemental New Drug Application (sNDA) for alosetron in June 2002, permitting remarketing under restricted conditions of use.
  • Approved only for severe diarrhea-predominant irritable bowel syndrome (IBS) in women with chronic symptoms who have not responded adequately to conventional therapy. (See Uses.)
  • May be prescribed only by clinicians who have enrolled in the Prescribing Program for Lotronex®. Before therapy is initiated, clinician must provide and patient must read the Medication Guide for Lotronex® and Patient-Physician Agreement for Lotronex® and both must sign the Agreement. (See Restricted Distribution Program under Dosage and Administration.)


FDA approved a REMS for alosetron to ensure that the benefits of a drug outweigh the risks. The REMS may apply to one or more preparations of alosetron and consists of the following: medication guide, elements to assure safe use, and implementation system. See the FDA REMS page ([Web]) or the ASHP REMS Resource Center ([Web]).

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