The polymyxin B sulphate is available as a freeze-dried powder freely soluble in saline solution in vial containing 500,000 unITs potency.

• （供应的）硫酸多粘菌素B硫酸盐为冻干粉末，可任意溶于盐溶液中，每小瓶含五十万单位（效价）。