PubMed HealthSearch

PubMed · 40575

Amoxapine in experimental psychopharmacology: a neuroleptic or an antidepressant?

Abstract

2-Chloro-11-(piperazinyl)dibenz[b,f][1,4]-oxazepine (amoxapine) gives an unusual spectrum in psychopharmacological tests. Many of its effects are similar to those of neuroleptics: sedation, decrease in motor activity, catalepsy (which is, however, qualitatively different from that induced by classical neuroleptics), transitory suppression of avoidance reaction, antagonism of amphetamine induced toxicity in crowded mice and inhibition of stereotyped behavior induced by amphetamine in rats, and antagonism to various effects of apomorphine (stereotyped behaviour in rats, climbing behaviour, stereotyped behaviour and hypothermia in mice). At similar doses which produce the above mentioned effects, amoxapine also shows effects atypical for a neuroleptic, but which are relatively characteristic of antidepressants: antagonism of prochlorperazine-induced catalepsy in rats, inhibition of reserpine induced hypothermia in mice and enhancement of yohimbine toxicity in mice. The profile of this substance does not facilitate the anticipation of therapeutic effects in humans.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

R Chermat, P Simon, J R Boissier. 1979. Amoxapine in experimental psychopharmacology: a neuroleptic or an antidepressant?. https://pubmed.ncbi.nlm.nih.gov/40575/

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

GLC analysis of loxapine, amoxapine, and their metabolites in serum and urine.

A GLC analysis is presented for loxapine, amoxapine, and their major metabolites in serum and urine. Electron-capture detection is employed for serum analysis, and flame ionization is used for urine analysis. The procedure includes trifluoroacetylation of secondary amine functions, followed by trimethylsilylation of phenolic groups after ethyl acetate extraction of the sample. Urine requires prior enzymatic hydrolysis of conjugates. Data indicating the utility of the procedure in hospitalized patients and normal volunteers are presented.

Amoxapine

Comparison of efficacy of amoxapine and imipramine in a multi-clinic double-blind study using the WHO schedule for a standard assessment of patients with depressive disorders.

A multi-clinic double-blind controlled study on amoxapine in comparison with imipramine, using the WHO Schedule for a Standard Assessment of Patients with Depressive Disorders, was performed and the data were analyzed with 111 patients. The assessment of severity of illness and overall improvement indicated clearly the superiority of the antidepressive effect of amoxapine to that of imipramine. The onset of antidepressive effect of amoxapine was clearly more rapid than that of imipramine, and in more than half of the patients in the amoxapine group the improvement was seen within four days following the drug administration. Amoxapine was superior to imipramine in terms of safety and usefulness. The side-effects due to amoxapine appeared less frequently and were less serious than with imipramine. The difference between amoxapine and imipramine was especially remarkable for hypotensive effect. The antidepressive effect of amoxaphine was superior to that of imipramine for almost all symptoms and signs. Amoxapine displayed an especially remarkable effect on psychomotor retardation, depressive feeling, anxiety and tension, somatic complaints and sleep disturbance.

Amoxapine

Amoxapine in depressive illness.

A double-blind trial was carried out in 29 patients recently admitted to hospital with depressive illness to compare the effectiveness and side-effect liability of treatment with amoxapine and imipramine. Both drugs were given in a dosage of 25 mg 3-times daily over a period of 4 weeks, and patients' progress was assessed using psychiatric and psychological rating scales for depression. Although amoxapine and imipramine proved equally effective, response to amoxapine was quicker and appeared to have the same effect after 1 week as did imipramine after 2 weeks. In addition, dryness of the mouth was complained of most frequently by patients taking imipramine.

Amoxapine