Two words: Buteyko method See e.g. http://www.normalbreathing.com CNS/Diseases of the Brain Are Caused by Low Brain O2/CO2 Levels http://www.normalbreathing.com/diseases-Brain.php Sedatives | CO2: Natural Sedative and Tranquilizer http://www.normalbreathing.com/CO2-stabilizer.php After 15 years of panic attacks, anxiety, migraines, hay fever... if finally found the solution: learn to breathe correctly again. The best…
If it works for you it works for you, but I'd caution readers to be skeptical when trying it out.