Trihexyphenidyl dependence

M. McInnis, H. Petursson

    Research output: Contribution to journalArticlepeer-review

    20 Scopus citations


    ABSTRACT– Trihexyphenidyl, a synthetic anticholinergic, is frequently used concurrently with neuroleptics to control extrapyramidal side effects. We present two case reports of trihexyphenidyl abuse which concur with the increasing concern expressed regarding the abuse potential of trihexyphenidyl. In one of the cases a double‐blind, placebo‐controlled withdrawal was conducted and monitored on a number of physiological parameters and the Hamilton Anxiety Rating Scale. A recognizable withdrawal syndrome followed discontinuation of the drug. In addition to the abuse potential it is suggested that dependence liability be considered in maintenance therapy with trihexyphenidyl and other antiparkinsonians.

    Original languageEnglish (US)
    Pages (from-to)538-542
    Number of pages5
    JournalActa Psychiatrica Scandinavica
    Issue number6
    StatePublished - Jun 1984


    • Trihexyphenidyl abuse
    • anti‐parkinsonian maintenance therapy
    • dependence
    • toxic psychosis
    • withdrawal

    ASJC Scopus subject areas

    • Psychiatry and Mental health


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