Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0012833 (dizziness)
 9,689 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Clozapine is an antipsychotic without the extra-pyramidal adverse effects associated with currently marketed antipsychotics. In animals, this drug has not been shown to induce catalepsy and only weakly antagonizes the stereotypic movements induced by apomorphine and the amphetamines. Clozapine is rapidly absorbed after both single and repeated oral doses, with steady-state concentrations attained within eight to ten days after beginning therapy. It is metabolized to N-oxideclozapine and N-desmethylclozapine, which have less pharmacological activity than the parent compound and are excreted in the urine and, to a lesser extent, in the feces. Clozapine has overall therapeutic efficacy and/or superiority to currently marketed antipsychotics in the treatment of refractory schizophrenia. Usual doses (25-900 mg/d) of clozapine cause fewer extrapyramidal adverse reactions than available antipsychotics. Hypotension, dizziness, salivation, and sedation are the most frequently reported adverse effects and tend to subside over time. Agranulocytosis is the most serious adverse reaction, and those receiving clozapine should undergo weekly white blood cell count determinations. Clozapine is useful for those treatment-resistant patients who have not responded to adequate trials of other antipsychotics.
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PMID:Clozapine: a novel antipsychotic agent. 265 70

During an ethnopharmacological survey carried out among some Quilombolas living in Brazil, 48 plants with possible central nervous system (CNS) action were cited. A mixture of nine plants, known as 'Tira-capeta' (Removing the Devil) cigarette, has been utilized for years as a tonic for the brain. The effects observed after consuming this cigarette are: dizziness, lightness sensation, humor changes, yawns, heavy eyes, hunger, sleep and relaxation. This study aimed to verify the effects of a hydroalcohol extract of 'Tira-capeta' cigarette (ETC), as well as to evaluate the phytochemical profile. The phytochemical screening carried out through characterization reactions, thin layer chromatography and high efficiency liquid chromatography indicated the presence of tannins, phenolic acids, flavonoids, saponins and alkaloids; tannins and phenolic acids being the principal constituents. The pharmacological tests showed that ETC induced a biphasic effect, with intense initial stimulation of the CNS, followed by a general depressor state; decreased the latency for sleeping and increased the total sleeping time (50, 100 and 500 mg/kg), without causing prejudice in motor coordination (doses up to 200 mg/kg); induced catalepsy in mice, verified 10 and 50 min after drug administration (500 mg/kg). Also, no anxiolytic or anxiogenic effects were verified in rats submitted to the elevated plus-maze.
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PMID:Preliminary investigation of the central nervous system effects of 'Tira-capeta' (Removing the Devil), a cigarette used by some Quilombolas living in Pantanal Wetlands of Brazil. 1857 Feb 35