No. Liu Guangji Black Medicine is a plaster developed by Xiangtan traditional Chinese medicine practitioner Liu Guangji. It is mainly used to treat cervical spine, lumbar spine and other diseases. The therapeutic effect is obvious. According to the official website of Liu Guangji Black Medicine, this plaster has passed the national plaster production requirements and complies with the national plaster production requirements. The OTC certification standard has a certain degree of authority, so it is a formal and reliable plaster, not a scammer.