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Biomedical subjects

R O Friedel

Publications and source records attributed to R O Friedel.

17 recordsLinked to original sources
PubMed1985

Brain ventricular size and CSF monoamine metabolites in an adolescent inpatient population.

The cerebrospinal fluid monoamine metabolites, homovanillic acid (HVA) and 5-hydroxyindoleacetic acid (5HIAA), were compared with ventricle-brain ratios (VBRs) in a group of adolescent inpatients who were divided into psychotic and nonpsychotic groups. HVA, 5HIAA, and VBR did not differ significantly between the two groups. There were no significant relationships between these variables in the nonpsychotic group. Psychotic adolescents, however, displayed significant negative correlations between VBR and HVA, and between VBR and 5HIAA. The relationship between VBR and monoamine metabolites appears to occur in psychoses other than schizophrenia, is present early in the course of illness, and probably does not represent a dilutional effect.

Adolescent↗
PubMed1979

Low-dose neuroleptic regimens in the treatment of borderline patients.

The use of pharmacologic agents in treating patients described as borderline generally has been accorded an insignificant, or at best, minor, role. We discuss this observation and review the literature that has dealt with this aspect of treatment. Diagnostic criteria are presented that appear to define a specific population of borderline patients who have been observed to be responsive to low doses of neuroleptic drugs. Five case histories of patients with conditions diagnosed and treated in this manner are presented, followed by a discussion of the implications of this approach in terms of clarifying the nosologic issues that have arisen around the "borderline" concept.

Adult↗
PubMed1979

Relationship of plasma levels of chlordiazepoxide and metabolites to clinical response.

The authors report on the relationship between the antianxiety effects of chronically administered chlordiazepoxide (CDX) and plasma levels of CDX and two of its metabolites, desmethylchlordiazepoxide (DMCDX) and demoxepam (DMX). Fifteen subjects with moderate to severe anxiety were studied in a double-blind, placebo-controlled, crossover design. Significant correlations were found between anxiety reduction and DMCDX and DMX plasma levels. No such correlation was observed between anxiety reduction and CDX levels. These data suggest that in chronically treated subjects, DMCDX and DMX have significant antianxiety properties which surpass those of CDX itself.

Adult↗
PubMed1978

Analysis of tricyclic antidepressants in human plasma by GLC--chemical-ionization mass spectrometry with selected ion monitoring.

A method is described for the analysis of amitriptyline, doxepin, imipramine, nortriptyline, desmethyldoxepin, desipramine, and protriptyline in human plasma utlizing GLC-chemical-ionization mass spectrometry with selected ion monitoring. The assay is highly specific and is quantitative to at least 1 ng/ml with a standard error typically less than 5%. Representative concentrations of the parent compounds and their monodemethylated metabolites, as meeasured in plasma samples from patients under treatment with tertiary amine tricyclic antidepressants, are given.

Antidepressive Agents, Tricyclic↗
PubMed1977

Subtypes of depression--diagnosis and medical management.

Depression is both a common and a greatly undertreated illness in the United States today. The focus of this review is a definition of the characteristics of four subtypes of depression which appear to be differentially sensitive to four different classes of medications. The tricyclic antidepressants should be used for patients with unipolar depression and vegetative symptoms. Lithium appears to be most effective for bipolar depressives. The monoamine oxidase (MAO) inhibitors are best used for patients with atypical depression. Antipsychotic medications appear to be useful for depressed patients with psychotic symptoms or agitation. Recent pharmacokinetic and biochemical data, including serum lithium levels, plasma tricyclic levels, and the predictive ability of pretreatment urinary 3-methoxy-4-hydroxyphenylglycol (MHPG) levels are also reviewed.

Adolescent↗
PubMed1976

Prediction of tricyclic antidepressant response: a critical review.

This article reviews all the prospective, double-blind controlled studies that have evaluated the prediction of response to imipramine hydrochloride and amitriptyline hydrochloride in depressed patients. Despite widely divergent methodologies, an attempt is made to extract clinically useful conclusions from these data. Critiques of each study and the criteria used in their evaluation are presented, with suggestions for future research included. The predictors of positive response to imipramine and amitriptyline are as follows: upper socioeconomic class, insidious onset, anorexia, weight loss, middle and late insomnia, and psychomotor disturbance. The predictors of poor response are the following: neurotic, hypochondriacal, and hysterical traits, multiple prior episodes, and delusions. Pretreatment urinary 3-methoxy-4-hydroxyphenylglycol (MHPG) levels may some day be useful in predicting to which of these two tricyclic antidepressants a patient will respond.

Adult↗