MENSTRUAL CYCLE-RELATED SENSITIVITY TO 35-PERCENT CO2 IN PANIC PATIENTS

In a double blind, random, cross-over design, 10 patients and seven controls inhaled one vital capacity of 35% CO2-65% O-2 during their early-follicular and midluteal phases, Anxiety after CO2 intake was significantly stronger in the early-follicular phase than in the midluteal phase for patients. Controls had no anxiety reactions.