The invention relates to a medicament which is intended for oral administration, which comprises a cyclooxygenase-2 inhibitor and which has improved bioavailability, and to a method of preparing said medicament. The inventive medicament comprises an agglomerate based on inert solid particles based on at least one excipient, said agglomerate comprising a cyclooxygenase-2 inhibitor and at least one hydrophilic polymer. According to the invention, the agglomerate comprises a spray which is applied to the aforementioned particles, consisting of a solution or suspension of micronized grains of the inhibitor in said polymer(s), in order to agglomerate said particles. The inventive method essentially comprises the following steps, namely: (i) the preparation of a sprayable liquid that is based on the micronized grains of said inhibitor in solution or in suspension in at least one hydrophilic polymer； and (ii) the spraying of the liquid onto the solid particles, in order to obtain the agglomerate by means of wet granulation, said agglomerate comprising the grain solution or suspension spray.
