The administration of drugs by the respiratory route. It includes insufflation into the respiratory tract.

Synonyms: Inhalation Drug Administration, Aerosol Drug Therapy, Administration, Inhalation, Drug Aerosol Therapy, Drug Therapy, Aerosol, Therapy, Aerosol Drug, Aerosol Therapy, Drug, Drug Administration, Respiratory, Drug Administration, Inhalation, Respiratory Drug Administration, Inhalation of Drugs, Administration, Respiratory Drug, Administration, Inhalation Drug, Therapy, Drug Aerosol, Inhalation Administration