Homarylamine hydrochloride is primarily used in the pharmaceutical industry as an active ingredient in medications designed to treat respiratory conditions. It acts as an antihistamine and bronchodilator, helping to alleviate symptoms of asthma, bronchitis, and other airway-related disorders by relaxing the smooth muscles in the airways and reducing inflammation. Additionally, it is utilized in research settings to study its effects on histamine receptors and its potential therapeutic applications in managing allergic reactions and respiratory distress. Its efficacy in improving airflow and reducing bronchial spasms makes it a valuable component in respiratory therapies.