The invention relates to a preparation method for salifying and freeze-
drying probenecid, which is characterized by comprising the following steps: reacting
probenecid and a salt-forming agent in injection water to form salt, adding a pH
regulator to regulate the pH value, adding absolute ethyl
alcohol, adsorbing and decolorizing with
activated carbon, filtering, and freeze-
drying to obtain the product, the
probenecid comprises probenecid,
sodium hydroxide and
sodium carbonate according to a
molar ratio of 1: 1: 0.01, a
solvent is injection water containing 3%-5% of
ethanol, and freeze-
drying comprises pre-freezing, annealing, heating to melt small
ice crystals, and re-freezing. The probenecid
sodium freeze-dried
powder is good in appearance property, stable in salt forming rate, controllable in pH and capable of improving the redissolution time, the product freeze-drying
process efficiency is improved, and it is guaranteed that the product quality is controllable. The process is simple and suitable for industrial production.