The invention relates to a compound analgin injection for
livestock and a preparation method thereof. Every 100ml of injection comprises 10-30g of analgin, 2-4g of L-
cysteine, 50-150mg of
dexamethasone sodium phosphate, 0.05g of EDTA-Na2, water for injection to 100mg, and pH
regulator (for regulating the pH value to 5.5-6.5). The preparation method comprises the following steps: dissolving
dexamethasone sodium phosphate to prepare a solution, dissolving the other components into a solution, merging the two solutions, stirring uniformly, regulating the pH value to 5.5-6.5 while continuing stirring, and diluting to the specified volume; and filtering the liquor through an organic filter membrane, respectively filling the filtrate into bottles by a filling and sealing
machine, sterilizing at 115 DEG C under the pressure of 0.2 MPa for 20 minutes, opening the sterilizing cabinet, naturally cooling for 10 minutes, closing the sterilizing cabinet, and sterilizing again for 20 minutes, thereby obtaining the finished product. The invention solves the problems of discoloration, content degradation,
toxicity increase and the like in the injection storage process. The invention has better
antipyretic effect, and is endowed with anti-inflammatory and antiallergic functions. The invention improves the appearance quality and
curative effect of the product. The invention is more convenient to use, and has wider application range.