The drug score combines druglikeness, cLogP, logS, molecular weight and toxicity risks in one handy value than may be used to judge the compound's overall potential to qualify for a drug. This value is calculated by multiplying contributions of the individual properties with the first equation:
ds is the drug score. si are the contributions calculated directly from of cLogP, logS, molweight and druglikeness with the second equation, which describes a spline curve. Parameters a and b are (1, -5), (-1, -5), (0.012, -6) and (-1, 0) for cLogP, logS, molweight and druglikeness, respectively. ti are the contributions taken from the 4 toxicity risk types. The ti values are 1.0, 0.8 and 0.6 for no risk, medium risk and high risk, respectively.