A method of dosing multiple drugs for an individual patient, by collecting data from the individual patient including drugs to be taken by the patient and genetic testing information, analyzing the individual patient data in view of dosing criteria established based on outside patient data, and determining doses of multiple drugs for each drug taken by the individual patient. A logic engine for dosing multiple drugs, including an algorithm stored on non-transitory computer readable media for collecting outside data to establish criteria for dosing multiple drugs to an individual patient and storing the outside data and individual patient data in a database, analyzing the individual patient data in view of criteria established from the outside data, and determining a dose for each drug to be taken.