The ingredients in Bazhen Pill react with bacteria in the intestine, resulting in an increase in gas production and fart. According to the query of traditional Chinese medicine network. After taking Bazhen Pill, some components in the medicine react with bacteria in the intestine, resulting in more gas and more farting. Bazhen Pill is a traditional Chinese medicine for invigorating qi and blood. It is made up of Sijunzi decoction, a tonic, and Siwu decoction, a blood tonic.