Asthma Inhalers Regulatory Relief Act of 1999 - Bars the Administrator of the Environmental Protection Agency, under title VI of the Clean Air Act, from prohibiting the manufacture, distribution, or sale of metered-dose inhalers that use chlorofluorocarbons unless the Administrator and the Commissioner of Food and Drugs jointly certify to the Congress that alternatives are available for all populations of inhaler users that are comparable in terms of safety, effectiveness, costs, and retail availability.