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LOTRONEX
Overview
What is LOTRONEX?
The active ingredient in LOTRONEX Tablets is alosetron hydrochloride (HCl), a potent and selective antagonist of the serotonin 5-HT
receptor type. Chemically, alosetron is designated as 2,3,4,5-tetrahydro-5-methyl-2-[(5-methyl-1H-imidazol-4-yl)methyl]-1H-pyrido[4,3-b]indol-1-one, monohydrochloride. Alosetron is achiral and has the empirical formula C
H
N
O•HCl, representing a molecular weight of 330.8. Alosetron is a white to beige solid that has a solubility of 61 mg/mL in water, 42 mg/mL in 0.1M hydrochloric acid, 0.3 mg/mL in pH 6 phosphate buffer, and <0.1 mg/mL in pH 8 phosphate buffer. The chemical structure of alosetron is:
LOTRONEX Tablets are supplied for oral administration as 0.5 mg (white) and 1 mg (blue) tablets. The 0.5 mg tablet contains 0.562 mg alosetron HCl equivalent to 0.5 mg alosetron, and the 1 mg tablet contains 1.124 mg alosetron HCl equivalent to 1 mg of alosetron. Each tablet also contains the inactive ingredients lactose (anhydrous), magnesium stearate, microcrystalline cellulose, and pregelatinized starch. The white film coat for the 0.5 mg tablet contains hypromellose, titanium dioxide, and triacetin. The blue film coat for the 1 mg tablet contains hypromellose, titanium dioxide, triacetin, and indigo carmine.
What does LOTRONEX look like?
What are the available doses of LOTRONEX?
0.5 mg and 1 mg tablets
LOTRONEX Tablets, 0.5 mg (0.562 mg alosetron HCl equivalent to 0.5 mg alosetron), are white, oval, film-coated tablets debossed with GX EX1 on one face.
LOTRONEX Tablets, 1 mg (1.124 mg alosetron HCl equivalent to 1 mg alosetron), are blue, oval, film-coated tablets debossed with GX CT1 on one face.
What should I talk to my health care provider before I take LOTRONEX?
How should I use LOTRONEX?
LOTRONEX is indicated only for women with severe diarrhea-predominant irritable bowel syndrome (IBS) who have:
Diarrhea-predominant IBS is severe if it includes diarrhea and one or more of the following:
Because of infrequent but serious gastrointestinal adverse reactions associated with LOTRONEX, the indication is restricted to those patients for whom the benefit-to-risk balance is most favorable.
Clinical studies have not been performed to adequately confirm the benefits of LOTRONEX in men.
To lower the risk of constipation, LOTRONEX should be started at a dosage of 0.5 mg twice a day. Patients who become constipated at this dosage should stop taking LOTRONEX until the constipation resolves. They may be restarted at 0.5 mg once a day. If constipation recurs at the lower dose, LOTRONEX should be discontinued immediately.
Patients well controlled on 0.5 mg once or twice a day may be maintained on this regimen. If after 4 weeks the dosage is well tolerated but does not adequately control IBS symptoms, then the dosage can be increased to up to 1 mg twice a day
LOTRONEX can be taken with or without food
.
LOTRONEX should be discontinued immediately in patients who develop constipation or signs of ischemic colitis. LOTRONEX should not be restarted in patients who develop ischemic colitis.
Clinical trial and postmarketing experience suggest that debilitated patients or patients taking additional medications that decrease gastrointestinal motility may be at greater risk of serious complications of constipation. Therefore, appropriate caution and follow-up should be exercised if LOTRONEX is prescribed for these patients.
Postmarketing experience suggests that elderly patients may be at greater risk for complications of constipation; therefore, appropriate caution and follow-up should be exercised if LOTRONEX is prescribed for these patients
.
What interacts with LOTRONEX?
Sorry No Records found
What are the warnings of LOTRONEX?
Sorry No Records found
What are the precautions of LOTRONEX?
Sorry No Records found
What are the side effects of LOTRONEX?
Sorry No records found
What should I look out for while using LOTRONEX?
Do not initiate in patients with constipation (
)
History of chronic or severe constipation or sequelae from constipation; intestinal obstruction, stricture, toxic megacolon, gastrointestinal perforation, and/or adhesions; ischemic colitis; impaired intestinal circulation, thrombophlebitis, or hypercoagulable state; Crohn's disease or ulcerative colitis; diverticulitis; severe hepatic impairment (
)
Concomitant use of fluvoxamine (
)
Infrequent but serious gastrointestinal adverse reactions have been reported with the use of LOTRONEX. These events, including ischemic colitis and serious complications of constipation, have resulted in hospitalization, and rarely, blood transfusion, surgery, and death.
What might happen if I take too much LOTRONEX?
There is no specific antidote for overdose of LOTRONEX. Patients should be managed with appropriate supportive therapy. Individual oral doses as large as 16 mg have been administered in clinical studies without significant adverse reactions. This dose is 8 times higher than the recommended total daily dose. Inhibition of the metabolic elimination and reduced first pass of other drugs might occur with overdoses of LOTRONEX
How should I store and handle LOTRONEX?
Care should be exercised in handling of THALOMID. THALOMID capsules should not be opened or crushed. If powder from THALOMID contacts the skin, wash the skin immediately and thoroughly with soap and water. If THALOMID contacts the mucous membranes, flush thoroughly with water. Procedures for proper handling and disposal of anticancer drugs should be considered. Several guidelines on the subject have been published.Rx only and only able to be prescribed and dispensed under the terms of the THALOMID REMS Restricted Distribution Program.Care should be exercised in handling of THALOMID. THALOMID capsules should not be opened or crushed. If powder from THALOMID contacts the skin, wash the skin immediately and thoroughly with soap and water. If THALOMID contacts the mucous membranes, flush thoroughly with water. Procedures for proper handling and disposal of anticancer drugs should be considered. Several guidelines on the subject have been published.Rx only and only able to be prescribed and dispensed under the terms of the THALOMID REMS Restricted Distribution Program.Care should be exercised in handling of THALOMID. THALOMID capsules should not be opened or crushed. If powder from THALOMID contacts the skin, wash the skin immediately and thoroughly with soap and water. If THALOMID contacts the mucous membranes, flush thoroughly with water. Procedures for proper handling and disposal of anticancer drugs should be considered. Several guidelines on the subject have been published.Rx only and only able to be prescribed and dispensed under the terms of the THALOMID REMS Restricted Distribution Program.LOTRONEX Tablets, 0.5 mg (0.562 mg alosetron HCl equivalent to 0.5 mg alosetron) are white, oval, film-coated tablets debossed with GX EX1 on one face.Bottles of 30 (NDC 65483-894-03) with child-resistant closures.LOTRONEX Tablets, 1 mg (1.124 mg alosetron HCl equivalent to 1 mg alosetron), are blue, oval, film-coated tablets debossed with GX CT1 on one face.Bottles of 30 (NDC 65483-895-03) with child-resistant closures.Store at 20-25°C (68-77°F) (USP Controlled Room Temperature). Protect from light and moisture.LOTRONEX Tablets, 0.5 mg (0.562 mg alosetron HCl equivalent to 0.5 mg alosetron) are white, oval, film-coated tablets debossed with GX EX1 on one face.Bottles of 30 (NDC 65483-894-03) with child-resistant closures.LOTRONEX Tablets, 1 mg (1.124 mg alosetron HCl equivalent to 1 mg alosetron), are blue, oval, film-coated tablets debossed with GX CT1 on one face.Bottles of 30 (NDC 65483-895-03) with child-resistant closures.Store at 20-25°C (68-77°F) (USP Controlled Room Temperature). Protect from light and moisture.LOTRONEX Tablets, 0.5 mg (0.562 mg alosetron HCl equivalent to 0.5 mg alosetron) are white, oval, film-coated tablets debossed with GX EX1 on one face.Bottles of 30 (NDC 65483-894-03) with child-resistant closures.LOTRONEX Tablets, 1 mg (1.124 mg alosetron HCl equivalent to 1 mg alosetron), are blue, oval, film-coated tablets debossed with GX CT1 on one face.Bottles of 30 (NDC 65483-895-03) with child-resistant closures.Store at 20-25°C (68-77°F) (USP Controlled Room Temperature). Protect from light and moisture.LOTRONEX Tablets, 0.5 mg (0.562 mg alosetron HCl equivalent to 0.5 mg alosetron) are white, oval, film-coated tablets debossed with GX EX1 on one face.Bottles of 30 (NDC 65483-894-03) with child-resistant closures.LOTRONEX Tablets, 1 mg (1.124 mg alosetron HCl equivalent to 1 mg alosetron), are blue, oval, film-coated tablets debossed with GX CT1 on one face.Bottles of 30 (NDC 65483-895-03) with child-resistant closures.Store at 20-25°C (68-77°F) (USP Controlled Room Temperature). Protect from light and moisture.LOTRONEX Tablets, 0.5 mg (0.562 mg alosetron HCl equivalent to 0.5 mg alosetron) are white, oval, film-coated tablets debossed with GX EX1 on one face.Bottles of 30 (NDC 65483-894-03) with child-resistant closures.LOTRONEX Tablets, 1 mg (1.124 mg alosetron HCl equivalent to 1 mg alosetron), are blue, oval, film-coated tablets debossed with GX CT1 on one face.Bottles of 30 (NDC 65483-895-03) with child-resistant closures.Store at 20-25°C (68-77°F) (USP Controlled Room Temperature). Protect from light and moisture.
Clinical Information
Chemical Structure
No Image foundClinical Pharmacology
Alosetron is a potent and selective 5-HT
receptor antagonist. 5-HT
receptors are ligand-gated cation channels that are extensively distributed on enteric neurons in the human gastrointestinal tract, as well as other peripheral and central locations. Activation of these channels and the resulting neuronal depolarization affect the regulation of visceral pain, colonic transit, and gastrointestinal secretions, processes that relate to the pathophysiology of IBS. 5-HT
receptor antagonists such as alosetron inhibit activation of non-selective cation channels, which results in the modulation of the enteric nervous system.
The cause of IBS is unknown. IBS is characterized by visceral hypersensitivity and hyperactivity of the gastrointestinal tract, which lead to abnormal sensations of pain and motor activity. Following distention of the rectum, patients with IBS exhibit pain and discomfort at lower volumes than healthy volunteers. Following such distention, alosetron reduced pain and exaggerated motor responses, possibly due to blockade of 5-HT
receptors.
Non-Clinical Toxicology
Do not initiate in patients with constipation ( )History of chronic or severe constipation or sequelae from constipation; intestinal obstruction, stricture, toxic megacolon, gastrointestinal perforation, and/or adhesions; ischemic colitis; impaired intestinal circulation, thrombophlebitis, or hypercoagulable state; Crohn's disease or ulcerative colitis; diverticulitis; severe hepatic impairment ( )
Concomitant use of fluvoxamine ( )
Infrequent but serious gastrointestinal adverse reactions have been reported with the use of LOTRONEX. These events, including ischemic colitis and serious complications of constipation, have resulted in hospitalization, and rarely, blood transfusion, surgery, and death.
Drug Interactions:
Some patients have experienced serious complications of constipation without warning.
Serious complications of constipation, including obstruction, ileus, impaction, toxic megacolon, and secondary bowel ischemia, have been reported with use of LOTRONEX during clinical trials. Complications of constipation have been reported with use of 1 mg twice daily and with lower doses. A dose response relationship has not been established for serious complications of constipation. In addition, rare cases of perforation and death have been reported from postmarketing clinical practice. In some cases, complications of constipation required intestinal surgery, including colectomy. Patients who are elderly, debilitated, or taking additional medications that decrease gastrointestinal motility may be at greater risk for complications of constipation.
LOTRONEX should be discontinued immediately in patients who develop constipation
The following adverse reactions are described in more detail in other sections of the label:
Reference
This information is obtained from the National Institute of Health's Standard Packaging Label drug database.
"https://dailymed.nlm.nih.gov/dailymed/"
While we update our database periodically, we cannot guarantee it is always updated to the latest version.
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