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Related Experiment Videos

The long-acting phenothiazines.

J E Groves, M R Mandel

    Archives of General Psychiatry
    |July 1, 1975
    PubMed
    Summary
    This summary is machine-generated.

    Long-acting injectable fluphenazine esters effectively treat schizophrenia, with the decanoate form offering longer duration and fewer side effects. This administration route improves patient adherence and is beneficial for those with oral medication absorption issues.

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    Area of Science:

    • Psychiatry
    • Pharmacology
    • Neuroscience

    Background:

    • Schizophrenia treatment often faces challenges with oral medication adherence.
    • Long-acting injectable antipsychotics offer an alternative administration route.
    • Phenothiazine esters, like fluphenazine, are used for long-term schizophrenia management.

    Purpose of the Study:

    • To evaluate the efficacy and side effect profile of fluphenazine enanthate and decanoate esters.
    • To assess the advantages of long-acting injectable fluphenazine in schizophrenia patient management.
    • To explore the utility of parenteral fluphenazine for patients with oral medication absorption difficulties.

    Main Methods:

    • Intramuscular injection of fluphenazine enanthate and decanoate esters.
    • Comparison of duration of action and incidence of side effects between the two esters.

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  • Assessment of treatment failure rates in outpatients receiving injectable versus oral antipsychotics.

    • Main Results:

    • Both fluphenazine esters are effective in treating schizophrenia's behavioral and cognitive symptoms.
    • Fluphenazine decanoate is longer-acting and has a lower incidence of side effects compared to fluphenazine enanthate.
    • Injectable phenothiazines significantly decrease treatment failure rates from 50% to approximately 20% in schizophrenic outpatients.
    • Extrapyramidal system disturbances are a major adverse effect of these medications.

    Conclusions:

    • Long-acting injectable fluphenazine esters provide an effective treatment option for schizophrenia.
    • The decanoate ester offers improved pharmacokinetic and safety profiles over the enanthate ester.
    • Parenteral administration enhances patient management, particularly for non-adherent patients and those with absorption issues, benefiting community mental health systems.