Expectorant APIs, also known as mucokinetic APIs, refer to a class of drugs that thins sputum, reduce its viscosity, accelerate the movement of respiratory mucosa and cilia, and improve sputum transport function. These compounds not only help eliminate phlegm and keep the respiratory tract open but also indirectly relieve coughs and asthma. Commonly used expectorant APIs are divided into strong expectorants, such as ammonium chloride, irritating expectorants, such as eucalyptus oil, and guaiacol, etc., and mucus-dissolving drugs, such as acetylcysteine, etc.

Protheragen-ING offers a full range of expectorant APIs to support customer research worldwide.