OTC logo is oval on the packaging of OTC drugs, with orange-red oval bottom for Class A and dark green oval bottom for Class B.. The fundamental purpose of classifying OTC drugs into Class A and Class B management is to maximize the convenience for the public to use drugs on the premise of ensuring drug safety.

Drug classification management is based on the principle of safety, effectiveness and convenience, and is managed according to the varieties, specifications, indications and routes of administration of drugs. OTC drugs are further divided into Class A OTC drugs and Class B OTC drugs according to the degree of safety. The former is relatively low in security, while the latter is relatively high in security.