Experimental solubilities of three benzodiazepines (chlordiazepoxide, diazepam, and lorazepam) in ethanol + water mixtures at 303.2 K are reported. The solubility of drugs was increased with the addition of ethanol and reached the maximum value of a volume fraction of 90 % of ethanol. The Jouyban-Acree model was used to fit the experimental data, and the solubilities were reproduced using previously trained version of the Jouyban-Acree model and the solubility data in monosolvents in which the overall mean relative deviations (OMRDs) of the models were 8.6 %, 21.9 % and 19.3 %. respectively, for the fitted model, the trained version for ethanol + water mixtures and generally trained version for various organic solvents + water mixtures.