The invention discloses a
triamcinolone acetonide acetate particle, and a preparation method and a medicinal composition thereof. The preparation method comprises the following steps: 1) heating and dissolving
triamcinolone acetonide acetate with
aqueous solution of
ethanol, naturally cooling the obtained solution to obtain
acicular crystals, washing away the
ethanol from the crystals with water for injection,
drying the washed crystals, and then adding the crystals into water for injection at a temperature of 0 to 10 DEG C; 2) linearly adding dropwise
triamcinolone acetonide acetate solution dissolved with
dimethyl formamide solution into the
mixed solution of the water for injection at the temperature of 0 to 10 DEG C obtained in the step 1), simultaneously stirring the
mixed solution, keeping the temperature of the
mixed solution at 0 to 15 DEG C, and continuing stirring the mixed solution for 1 to 30 minutes to obtain a mixture of water and crystals; and 3) as usual, filtering the mixture of the water and the crystals obtained in the step 2) and vacuum-
drying the obtained crystals. The invention adopts a
crystal inoculation process, thus crystals of the prepared
triamcinolone acetonide acetate particles have regular shapes and uniform particle sizes;
crystallization is free from jet milling and the physicochemical property of the particle is stable; and no
crystal expansion phenomenon generates in the prepared
triamcinolone acetonide acetate suspension injection during storage.