EXHIBIT 23.1 KPMG LLP Suite 1200 21700 Oxnard Street Woodland Hills, CA 91367 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM The Board of Directors Chad Therapeutics, Inc. We consent to the incorporation by reference in the registration statement on Form S-8 of Chad Therapeutics, Inc. of our report dated April 23, 2004, with respect to the balance sheets of Chad Therapeutics, Inc. as of March 31, 2004 and 2003, and the related statements of operations, shareholders' equity and cash flows for each of the years in the three-year period ended March 31, 2004, which report appears in the March 31, 2004 annual report on Form 10-K of Chad Therapeutics, Inc. /s/ KPMG LLP Los Angeles, California September 28, 2004