Veterinary procaine penicillin-dihydrostreptomycin sulfate suspension injection and preparation method thereof

The invention relates to a veterinary drug and particularly relates to a veterinary procaine penicillin-dihydrostreptomycin sulfate suspension injection and a preparation method thereof. The injection comprises 5%-30% (w/v) of procaine penicillin, 5%-30% (w/v) of dihydrostreptomycin sulfate, a proper dosage of buffer solution, 0.02%-0.2% (w/v) of a preservative, 0.5%-15% (w/v) of a dispersing agent, 0.2%-20% (w/v) of a suspending agent, 0.5%-2% (w/v) of a stabilizer and local analgesic and 0.02%-0.5% (w/v) of an antioxidant, wherein the dispersion medium is injection water. According to the invention, the procaine penicillin and the dihydrostreptomycin sulfate are creatively formed to a compound preparation, which not only improves the application convenience of the two drugs, but also expands the antibacterial spectrum of the drugs to greatly facilitate the clinical use of veterinaries, and meanwhile, specific ingredients are selected and utilized to solve the problem of preparing the suspension injection with water as medium.