Indications: For the treatment of infectious animal diseases, especially for swine dysentery, swine mycoplasma pneumonia, diarrhea and the treatment and prevention of excellent results. Pharmacological effects: Valnemulin is derivative of pleuromutilin, is diterpene semi-synthesis anti-biotics, is homologous compound of Tiamulin. The mechanism of action is combing with ribosomal 50S subunit of pathogenic microorganisms, Inhibiting pathogenic microorganisms protein synthesis and resulting in the death of pathogenic microorganisms.