Pill is a spherical dosage form made of fine powder of medicinal materials, binder or medicinal material extract and excipient. It is one of the oldest dosage forms of Chinese patent medicine. It takes a certain time for pills to dissolve and disperse and be gradually absorbed by the human body. Therefore, the pill has slow curative effect and lasting drug effect, which can reduce the bad smell of some medicinal materials. It is the most commonly used dosage form of Chinese patent medicine at present. .