The invention discloses a long-acting
analgesic compound as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing a
mixed solution containing a
polymer, a
local anesthetic, a non-steroidal anti-inflammatory
drug and a
solvent into
drug-loaded microspheres through an electrostatic spraying technology; the preparation method comprises the following steps: dissolving
poloxamer and a natural
polymer material in water to obtain a hydrogel solution; and uniformly mixing the
drug-loaded microspheres and a hydrogel solution to prepare the long-acting
analgesic compound. The long-acting
analgesic compound comprises drug-loaded microspheres and hydrogel, the long-acting analgesic compound and the hydrogel are both of a three-dimensional
porous network structure, the drug-loaded microspheres are evenly dispersed in the hydrogel, and the drug-loaded microspheres are of a
solid spherical structure. The advantages of electrostatic spraying microspheres and hydrogel are combined, the preparation method is mild in condition and simple in process, and the preparation process is non-toxic and harmless; the long-acting analgesic compound has the advantages of thermosensitivity, injectability, high drug
loading rate and the like, and can be effectively applied to preparation of analgesic products.