Maa: Yhdysvallat
Kieli: englanti
Lähde: NLM (National Library of Medicine)
PHENOBARBITAL (UNII: YQE403BP4D) (PHENOBARBITAL - UNII:YQE403BP4D)
Cardinal Health
PHENOBARBITAL
PHENOBARBITAL 16.2 mg
PRESCRIPTION DRUG
unapproved drug other
PHENOBARBITAL- PHENOBARBITAL TABLET CARDINAL HEALTH _Disclaimer: This drug has not been found by FDA to be safe and effective, and this labeling has not been_ _approved by FDA. For further information about unapproved drugs, click here._ ---------- PHENOBARBITAL TABLETS, USP CIV RX ONLY WARNING: MAY BE HABIT-FORMING DESCRIPTION The barbiturates are nonselective central nervous system (CNS) depressants that are primarily used as sedative-hypnotics. In subhypnotic doses, they are also used as anticonvulsants. The barbiturates and their sodium salts are subject to control under the Federal Controlled Substances Act. Phenobarbital is a barbituric acid derivative and occurs as white, odorless, small crystals or crystalline powder that is very slightly soluble in water; soluble in alcohol, in ether, and in solutions of fixed alkali hydroxides and carbonates; sparingly soluble in chloroform. Phenobarbital is 5-ethyl-5- phenylbarbituric acid. Phenobarbital is a substituted pyrimidine derivative in which the basic structure is barbituric acid, a substance that has no CNS activity. CNS activity is obtained by substituting alkyl, alkenyl, or aryl groups on the pyrimidine ring. It has the following structural formula: Each phenobarbital tablet contains 16.2 mg, 32.4 mg, 64.8 mg or 97.2 mg of phenobarbital. In addition each tablet contains: colloidal silicon dioxide, lactose monohydrate, magnesium stearate, microcrystalline cellulose and sodium starch glycolate. CLINICAL PHARMACOLOGY Barbiturates are capable of producing all levels of CNS mood alteration, from excitation to mild sedation, hypnosis, and deep coma. Overdosage can produce death. In high enough therapeutic doses, barbiturates induce anesthesia. Barbiturates depress the sensory cortex, decrease motor activity, alter cerebellar function, and produce drowsiness, sedation, and hypnosis. Barbiturate-induced sleep differs from physiologic sleep. Sleep laboratory studies have demonstrated that barbiturates reduce the amount of time spent in the rapid eye movement (REM) Lue koko asiakirja