Patient-specific design of medicines (PSDM) is novel method which was first described by Smith and Jones. PSDM method is based on the conventional designs modified by using alternative gene-based protocol. main feature of the PSDM approach is its high specificity of treatment. the principle of the PSDM approach is depicted in the Figure 1. Using PSDM method, we observe the shift in the specificity of the treatment. During the normal design of medicines, specificity is obtained from experience of the scientists. in the PSDM method, the specificity is obtained from the genes of the patient. specificity of the PSDM method can be augmented by adding information from the family members. the PSDM method is estimated to increase specificity by factor of five.