1. A method for calculating a new dose of a drug for a patient using said drug, comprising the steps of: accepting as a first input the patient's current drug dose; accepting as a second input the maximum dose of the drug; accepting as a third input one or more numerical markers indicating a response of the patient; calculating said new dose, wherein said new dose is a function of said current dose minus the ratio of the change in numerical markers and the ratio of said current dose to said maximum dose plus the percent of individual patient response multiplied by a response factor; and said calculating step includes calculating said new dose based on the equation NDD&equals;CDD −&lcub;&lsqb;(( CDNM−DDNM )/ CDNM )/(1&plus;( CDD/HIGH ))&rsqb;× CDD&rcub;&plus;LV and: EDNM &equals;&lsqb;(( CDD−PDD )/ PDD )×(1&plus;( PDD/HIGH ))× PDNM&rsqb;&plus;PDNM and: if CDNM<DDNM, and EDNM>CDNM, or if CDNM>DDNM, and EDNM<CDNM, then LV &equals;( RESPONSE×CDD )×&lsqb;( EDNM−CDNM )/ CDNM&rsqb;/&lsqb; 1.3ˆ ( CDD/HIGH )&rsqb;, but if CDNM<DDNM, and EDNM<CDNM, or if CDNM>DDNM, and EDNM>CDNM, then LV&equals;− 1×( RESPONSE×CDD )×&lsqb;( CDNM−EDNM )/ CDNM&rsqb;/&lsqb; 1.3ˆ ( CDD/HIGH )&rsqb;, NDD&equals;New Drug Dose CDD&equals;Current Drug Dose CDNM&equals;Current Drug Numerical Marker DDNM&equals;Desired Drug Numerical Marker HIGH&equals;The input parameter that is the high dose range for a particular drug EDNM&equals;Expected Drug Numerical Marker PDD&equals;Previous Drug Dose PDNM&equals;Previous Drug Numerical Marker RESPONSE&equals;Percent of total dose available for individualizing patient dose 1.3ˆ (CDD/HIGH)&equals;1.3 raised to an exponent of (CDD/HIGH).