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  • Title: Sumatriptan, 5-HT(1D) receptors and obsessive-compulsive disorder.
    Author: Koran LM, Pallanti S, Quercioli L.
    Journal: Eur Neuropsychopharmacol; 2001 Apr; 11(2):169-72. PubMed ID: 11313163.
    Abstract:
    BACKGROUND: After considering the effects of 5-HT receptor agonists with different binding profiles on the symptoms of obsessive-compulsive disorder (OCD), Zohar and Kindler hypothesized that the 5-HT(1D) receptor was implicated in this disorder's pathophysiology. METHODS: We explored the 5-HT(1D) hypothesis in a 5-day, random, double-blind, placebo-controlled trial of oral sumatriptan 100 mg/day in medication-free adults with OCD. We hypothesized that sumatriptan, a 5-HT(1D) agonist, would diminish 5-HT release, thereby worsening OCD symptoms. We further hypothesized that by beginning to desensitize 5-HT(1D) receptors, sumatriptan pretreatment would promote a faster response or an increased likelihood of response to subsequent treatment with a selective serotonin reuptake inhibitor. RESULTS: The five sumatriptan subjects' OCD symptom worsening, as measured by the Yale-Brown scale ( upward arrow 17.6% (S.D. 14.6)), was significant when compared to the slight symptom decrease in the five placebo subjects ( downward arrow 5.2% (S.D. 4.9), P<0.015). The sumatriptan group did not exhibit a faster response or greater likelihood of response to a 90-day, open label trial of paroxetine. CONCLUSIONS: Longer term studies of the effects of 5-HT(1D) agonists on OCD symptoms are indicated. Zolmitriptan, a potent 5-HT(1D) receptor agonist with better penetration of the blood-brain barrier, may be a preferred challenge agent.
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