The crossword solution for the term 'Inhalant Ingredient' is 'STEROID'. Steroids are a class of organic compounds that contain four rings of carbon atoms. They are naturally occurring hormones produced by the body, and they can also be synthetically produced in a laboratory. Steroids are used to treat a variety of medical conditions, including asthma, allergies, and inflammation. Inhalants containing steroids are often prescribed to treat breathing difficulties.