Lee's Pharmaceutical Holdings Limited, an investment holding company, develops, manufactures, markets, and sells pharmaceutical products in the People's Republic of China, Hong Kong, and internationally. It focuses on various disease areas, such as cardiovascular, woman’s health, pediatrics, rare diseases, oncology, dermatology, and obstetrics. It operates in Proprietary and Generic Products; and Licensed-In Products segments. The Proprietary and Generic Products segment manufactures and sells Nadroparin Calcium injection and Livaracine to treat blood clots and deep vein thrombosis; Yallaferon for viral infection; Slounase for hemostasis; Socazolimab Injection for Recurrent or metastatic cervical cancer; Treprostinil injection for pulmonary arterial hypertension; fondaparinux sodium injection for deep vein thrombosis; and Sodium Phenylbutyrate Granules to treat urea cycle disorders; Apremilast Tablets for Plaque psoriasis; and Azilsartan Tablets for hypertension.