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Pilot Study of Psilocybin Treatment for Anxiety in Patients With Advanced-Stage Cancer (2010)

Pilot Study of Psilocybin Treatment for Anxiety in Patients With Advanced-Stage Cancer (2010)

  1. Jatelka
    Arch Gen Psychi 2010,Published online Sep 6

    Grob CS, Danforth AL, Chopra GS, Hagerty M, McKay CR, Halberstadt AL, Greer GR

    CONTEXT: Researchers conducted extensive investigations of hallucinogens in the 1950s and 1960s. By the early 1970s, however, political and cultural pressures forced the cessation of all projects. This investigation reexamines a potentially promising clinical application of hallucinogens in the treatment of anxiety reactive to advanced-stage cancer.
    OBJECTIVE: To explore the safety and efficacy of psilocybin in patients with advanced-stage cancer and reactive anxiety.
    DESIGN: A double-blind, placebo-controlled study of patients with advanced-stage cancer and anxiety, with subjects acting as their own control, using a moderate dose (0.2 mg/kg) of psilocybin.
    SETTING: A clinical research unit within a large public sector academic medical center.
    PARTICIPANTS: Twelve adults with advanced-stage cancer and anxiety.
    MAIN OUTCOME MEASURES: In addition to monitoring safety and subjective experience before and during experimental treatment sessions, follow-up data including results from the Beck Depression Inventory, Profile of Mood States, and State-Trait Anxiety Inventory were collected unblinded for 6 months after treatment.
    RESULTS: Safe physiological and psychological responses were documented during treatment sessions. There were no clinically significant adverse events with psilocybin. The State-Trait Anxiety Inventory trait anxiety subscale demonstrated a significant reduction in anxiety at 1 and 3 months after treatment. The Beck Depression Inventory revealed an improvement of mood that reached significance at 6 months; the Profile of Mood States identified mood improvement after treatment with psilocybin that approached but did not reach significance.
    CONCLUSIONS: This study established the feasibility and safety of administering moderate doses of psilocybin to patients with advanced-stage cancer and anxiety. Some of the data revealed a positive trend toward improved mood and anxiety. These results support the need for more research in this long-neglected field.