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The American Journal of Psychiatry, VOL. 147, No. 6

REGULAR ARTICLES | June 01, 1990

Response to 35% CO2 as a marker of panic in severe anxiety

Am J Psychiatry 1990;147:796-797.

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Abstract

One inhalation of 35% CO2 was administered to each of 32 patients with high anxiety ratings. Only patients with panic disorder had increases in reported anxiety upon CO2 intake. CO2-triggered anxiety appears specific for panic disorder and independent of baseline anxiety.

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anxiety ; panic

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