Țară: Statele Unite ale Americii
Limbă: engleză
Sursă: NLM (National Library of Medicine)
TEMAZEPAM (UNII: CHB1QD2QSS) (TEMAZEPAM - UNII:CHB1QD2QSS)
Preferred Pharmaceuticals Inc.
TEMAZEPAM
TEMAZEPAM 30 mg
PRESCRIPTION DRUG
Abbreviated New Drug Application
TEMAZEPAM- TEMAZEPAM CAPSULE PREFERRED PHARMACEUTICALS INC. ---------- TEMAZEPAM CAPSULES, USP C-IV RX ONLY DESCRIPTION Temazepam, USP is a benzodiazepine hypnotic agent. The chemical name is 7-chloro-1,3-dihydro-3- hydroxy-1-methyl-5-phenyl-2_H_-1,4-benzodiazepin-2-one, and the structural formula is: Temazepam, USP is a white, crystalline substance, very slightly soluble in water and sparingly soluble in alcohol, USP. Each capsule for oral administration contains either 7.5 mg, 15 mg, 22.5 mg or 30 mg temazepam, USP. The inactive ingredients include: ammonia, black iron oxide, butyl alcohol, croscarmellose sodium, dehydrated alcohol, gelatin, isopropyl alcohol, lactose monohydrate, magnesium stearate, polyethylene glycol, potassium hydroxide, propylene glycol, shellac, and titanium dioxide. Additionally, the 7.5 mg capsule contains D&C Red #28 and FD&C Blue #1 and the 15 mg and 22.5 mg capsules contain FD&C Blue #1, FD&C Red #40 and FD&C Yellow #6. CLINICAL PHARMACOLOGY PHARMACOKINETICS In a single and multiple dose absorption, distribution, metabolism, and excretion (ADME) study, using H labeled drug, temazepam was well absorbed and found to have minimal (8%) first pass metabolism. There were no active metabolites formed and the only significant metabolite present in blood was the O-conjugate. The unchanged drug was 96% bound to plasma proteins. The blood level decline of the parent drug was biphasic with the short half-life ranging from 0.4 to 0.6 hours and the terminal half-life from 3.5 to 18.4 hours (mean 8.8 hours), depending on the study population and method of determination. Metabolites were formed with a half-life of 10 hours and excreted with a half-life of approximately 2 hours. Thus, formation of the major metabolite is the rate limiting step in the biodisposition of temazepam. There is no accumulation of metabolites. A dose-proportional relationship has been established for the area under the plasma concentration/time curve over the 15 to 30 mg dose range. Temazepam was completely metabolized throu Citiți documentul complet