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RX BIN: 015558RX PCN: HTGroup ID: DDN6600Card Holder ID: DDN6600
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2019 Price of Lotronex

$383.7460 tablets/0.5mg
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Alosetron volume of distribution

Alosetron demonstrates a volume of distribution of approximately 65 to 95 L. Plasma protein binding is 82% over a concentration range of 20 to 4000 ng/mL.

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2018 Statistics

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Discount Cards 16,000+


Clients Benefit 29%


Total savings $4,735,080

What is Alosetron

Alosetron is a 5-HT3 antagonist used only for the management of severe diarrhoea-predominant irritable bowel syndrome (IBS) in women. Alosetron has an antagonist action on the 5-HT3 receptors and thus may modulate serotonin-sensitive gastrointestinal (GI) processes. Alosetron was voluntarily withdrawn from the US market in November 2000 by the manufacturer due to numerous reports of severe adverse effects including ischemic colitis, severely obstructed or ruptured bowel, and death. In June 2002, the FDA approved a supplemental new drug application allowing the remarketing of the drug under restricted conditions of use.

Alosetron mechanism of action

Alosetron is a potent and selective 5-HT sub 3 /sub receptor antagonist. 5-HT sub 3 /sub receptors are nonselective 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 irritable bowel syndrome (IBS). 5-HT sub 3 /sub receptor antagonists such as alosetron inhibit activation of non-selective cation channels which results in the modulation of serotonin-sensitive GI motor and sensory processes.

Dosage forms of Alosetron

Tabletoral.5 mg/1
Tabletoral1 mg/1

Prescription Generics


International Brands

Alosetron Hydrochloride




West Ward Pharmaceuticals Corp.

CAS number






Affected organisms

Humans and other mammals

Indication of Alosetron

Only for the treatment of symptoms of severe diarrhea-predominant irritable bowel syndrome (IBS) in women with chronic symptoms (generally lasting greater than 6 months) who does not present with anatomic or biochemical GI abnormalities and have not responded to conventional therapy.

Toxicity of Alosetron

Alosetron has proved safe in a range of toxicity studies; at high repeated dosing, clinical signs were transient and repeated administration produced no significant adverse effects on fertility, reproductive performance or fetal development. In pharmacokinetic studies, bioavailability of alosetron in healthy volunteers is approximately 60% and the plasma half-life is about 1.5 h. There are some gender differences in the pharmacokinetic profile, with 30 – 50% higher alosetron concentrations in females. No consistent differences in alosetron serum concentrations between the young and elderly were observed. The pharmacokinetics of single, oral doses of alosetron are linear up to 8 mg.

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