The article you requested is

Beneficial Effects of the Antiglutamatergic Agent Riluzole in a Patient Diagnosed With Trichotillomania

J Clin Psychiatry 2007;68(1):170-171 [letter]

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Sir: Trichotillomania is an impulse control disorder characterized by compulsive hairpulling. While the incidence of hairpulling is quite high in some populations, full criteria for trichotillomania are met by less than 1% of the population.1–3 Severe cases can lead to bald patches and marked social disability.