title: The 35% CO2 hyperreactivity and clinical symptomatology in patients with panic disorder after 1 week of treatment with citalopram: an open study.
abstract: The effect of a short treatment (7 days) with citalopram on the reactivity to inhalations of 35% CO2 and 65% oxygen and on clinical symptomatology was investigated in 15 patients with panic disorder who had a positive response to 35% CO2 inhalation. An open study design was applied. On day 0, before starting drug treatment, and after 1 week of treatment, each patient underwent the 35% CO2 challenge, and clinical symptomatology was evaluated with psychometric scales. The results showed a significant reduction of CO2 reactivity and of scores on the anticipatory anxiety subscale of Panic Associated Symptoms Scale. These results confirm that the serotonergic system plays an important role in the modulation of CO2 hyperreactivity and suggest an early anxiolytic effect of citalopram in patients who have panic disorder and are hyperreactive to CO2.
authors.affiliation: Department of Neuropsychiatric Sciences, University of Milan, Istituto Scientifico HS Raffaele, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Bertani
authors.forename: D
authors.initials: D
authors.lastname: Caldirola
authors.forename: R
authors.initials: R
authors.lastname: Bussi
authors.forename: L
authors.initials: L
authors.lastname: Bellodi
authors.forename: G
authors.initials: G
authors.lastname: Perna
mesh_terms: D000293:Adolescent; D000328:Adult; D000379:Agoraphobia / Q000188:drug therapy / Q000523:psychology; D018687:Antidepressive Agents, Second-Generation / Q000627:therapeutic use*; D002245:Carbon Dioxide / Q000008:administration & dosage; D015283:Citalopram / Q000627:therapeutic use*; D018592:Cross-Over Studies; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D008297:Male; D016584:Panic Disorder / Q000188:drug therapy* / Q000523:psychology; D011594:Psychometrics
chemical_list: D018687:Antidepressive Agents, Second-Generation; D015283:Citalopram; D002245:Carbon Dioxide