Kraj: Stany Zjednoczone
Język: angielski
Źródło: NLM (National Library of Medicine)
ONDANSETRON (UNII: 4AF302ESOS) (ONDANSETRON - UNII:4AF302ESOS)
Preferred Pharmaceuticals Inc.
ONDANSETRON
ONDANSETRON 8 mg
PRESCRIPTION DRUG
Abbreviated New Drug Application
ONDANSETRON- ONDANSETRON TABLET, ORALLY DISINTEGRATING PREFERRED PHARMACEUTICALS INC. ---------- ONDANSETRON ORALLY DISINTEGRATING TABLETS, USP DESCRIPTION The active ingredient in ondansetron orally disintegrating tablets, USP is ondansetron base, the racemic form of ondansetron, and a selective blocking agent of the serotonin 5-HT receptor type. Chemically it is (±) 1, 2, 3, 9-tetrahydro-9-methyl-3-[(2-methyl-1 H-imidazol- 1-yl)methyl]-4H-carbazol-4-one. It has the following structural formula: The molecular formula is C H N O representing a molecular weight of 293.4. USP disintegration test pending. Each ondansetron orally disintegrating tablet, USP intended for oral administration contains 4 mg or 8 mg of ondansetron base. In addition, each ondansetron orally disintegrating tablet, USP contains the following inactive ingredients: aspartame, calcium stearate, colloidal silicon dioxide, mannitol, microcrystalline cellulose, polacrilin potassium, sodium starch glycolate, strawberry flavor and talc. Ondansetron orally disintegrating tablets, USP are a orally administered formulation of ondansetron which rapidly disintegrates on the tongue and does not require water to aid dissolution or swallowing. CLINICAL PHARMACOLOGY PHARMACODYNAMICS Ondansetron is a selective 5-HT receptor antagonist. While its mechanism of action has not been fully characterized, ondansetron is not a dopamine-receptor antagonist. Serotonin receptors of the 5-HT type are present both peripherally on vagal nerve terminals and centrally in the chemoreceptor trigger zone of the area postrema. It is not certain whether ondansetron's antiemetic action is mediated centrally, peripherally, or in both sites. However, cytotoxic chemotherapy appears to be associated with release of serotonin from the enterochromaffin cells of the small intestine. In humans, urinary 5-HIAA (5- hydroxyindoleacetic acid) excretion increases after cisplatin administration in parallel with the onset of emesis. The released serotonin may stimulate the vagal afferents throug Przeczytaj cały dokument