The aqueous solubility of poorly water-soluble drugs is an important factor of many factors affecting their bioavailability such as the solubility and rate of dissolution in water. A series of attempts to enhance the bioavailability of poorly water-soluble drugs have been made by the fine grinding technique using a planetary ball mill. For the prediction of aqueous solubility, the experimental solubility data was collected and extracted by Tanimoto similarity filter then the QSPR approach using genetic algorithm (GA) was applied. The possibility of improving the bioavailability properties of the drugs such as ursodeoxycholic acid (UDCA), diphenyl hydrantoin (phenytoin) and biphenyl dimethyl dicarboxylate (DDB) based on the molecular interaction between drug and additives occurred by mechanochemical effect during ultra-fine grinding process has been discussed in comparison with experimental data and predicted data of intrinsic bioavailability of the drugs based on molecular modeling approach and in vitro test for the drugs.

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