Usage The chamber is intended to be used along with a metered dose inhaler to deliver aerosol medication to your cat’s lungs as prescribed by your veterinarian. Chamber can be used with any canine inhalerNOTE:If you want to change the mask,please by running hot water over it. Delivers medications directly to the lungs, requiring a lower dose of drugs with fewer side effects. Works with all metered dose inhalers prescribed by veterinarians for cats’ wheezing, asthma, etc. Feline Aerosol Chamber allows your cat to breathe normally while inhaling medication.