With the development of animal husbandry in our country, the combination of clinical drug application, especially in the feed and drug infusion to add more and more, often appear the problem of compatibility taboo, must always pay attention to the compatibility method of experience, to further improve the quality of clinical drug use.Penicillin and tetracycline, sulfa drug combination is the model of rational drug compatibility taboo.Penicillin should not with erythromycin, vancomycin, chlorpromazine, adrenaline, sodium bicarbonate and other intravenous application at the same time, in order to avoid low price reduction, turbidity or precipitation.Sulfuric acid chain unfavorable amino glycosides with other antibiotics, to avoid increased toxicity.Gentamycin sulfate With amphotericin B, heparin sodium, and cloxacillin compatibility share, because all can cause the product solution precipitation.Kanamycin sulfate cream with alkaline drug compatibility, can increase the toxic effect.Sulfa sodium salt cannot be Shared with acidic drugs, with precipitation.Norfloxacin (norfloxacin) with chloramphenicol, rifampicin, furan butyl share.Chloramphenicol and rifampicin can adersely affect gatifloxacin;Furan temple butyl against fluoride acid absorption in the antibacterial function of urethra, so compatibility taboo.Procaine produced by the hydrolysis of ammonia acid can adersely affect sulfanilamide antibacterial effect, therefore, avoid to be Shared with sulphonamide.Acetylsalicylic acid should try to avoid and glucocorticoid share, the share may be exacerbated bleeding;With aminophylline and other basic drugs such as sodium bicarbonate share can reduce the effect of this product.Aminophylline injection in a certain concentration in the acidic drugs with theophylline precipitate out, therefore, should not be compatibility.pepsin Avoid with alkaline drug compatibility.Lactasinum biofermin cream with bismuth agent, tannin, activated carbon, tincture share, because of these agents can inhibit, adsorption or kill lactobacilli.Castor oil of fat-soluble toxin such as phosphorus, benzene poisoning, should not be applied, because it can increase the absorption of fat-soluble toxin.Tannic acid protein is unfavorable with trypsin, pepsin, lactasinum biofermin clothing, because of these proteins combined with tannin namely lose activity;Tannic acid can make ferrous sulfate, amidopyrine, digitalis drugs are precipitated, and interfere with the absorption, affect curative effect.Iron agent such as ferrous sulfate can form complex with tetracycline drugs, interfere with each other.