Ruidaxi® (latanoprost eye drops, 0.005%), a product covered by the national medical insurance system, was developed by AZAD from Switzerland and manufactured by Teajoon from South Korea. It has been marketed for more than 10 years and launched in 17 countries, including Germany, France, Spain, and the Netherlands, etc. Prostaglandin based anti-glaucoma products are recommended by many guidelines as first-line drugs for open-angle glaucoma.