RESUMO
Yohimbine hydrochloride was administered intravenously to nine normal volunteers to assess alpha 2-adrenergic receptor function. Plasma catecholamines, cortisol, and psychophysiological parameters (blood pressure, pulse, somatic symptoms checklist, and visual analogue scales assessing mood) were used as dependent variables. Plasma norepinephrine and plasma cortisol increased significantly after yohimbine administration, while epinephrine remained unchanged. Systolic blood pressure and somatic symptoms were also significantly increased by yohimbine. These findings suggest that low-dose intravenous yohimbine is an effective probe for alpha 2-adrenergic receptors and the hypothalamic-pituitary-adrenal axis.
Assuntos
Pressão Sanguínea/efeitos dos fármacos , Epinefrina/sangue , Hidrocortisona/sangue , Norepinefrina/sangue , Ioimbina/farmacologia , Adulto , Afeto/efeitos dos fármacos , Comportamento/efeitos dos fármacos , Avaliação de Medicamentos , Feminino , Humanos , Sistema Hipotálamo-Hipofisário/efeitos dos fármacos , Infusões Intravenosas , Masculino , Pessoa de Meia-Idade , Sistema Hipófise-Suprarrenal/efeitos dos fármacos , Receptores Adrenérgicos alfa/efeitos dos fármacos , Ioimbina/sangueRESUMO
Ten patients treated with electroconvulsive therapy (ECT) only were followed with serial sleep polysomnographic recordings and dexamethasone suppression tests (DSTs). Both biological correlates of depression showed improvement with ECT. The use of serial sleep measures and serial DSTs in monitoring the clinical response to ECT is discussed.