The invention relates to a cocrystal comprising a) at least bilastine and, b) at least a cocrystal forming compound selected from the group consisting of glutaric acid, adipic acid, sorbic acid, succinic acid, benzoic acid, 4-aminobenzoic acid, L-malic acid, resorcinol, methyl 4-hydroxy benzoate and N-(4- hydroxyphenyl)acetamide and mixtures thereof, or a solvate thereof. The invention further relates to methods for obtaining said cocrystals and to their use in the treatment and/or prevention of conditions mediated by H1 histamine receptor, such as allergic disorders or diseases. The invention also relates to a method for increase the aqueous solubility of the above compounds of formula (I).
