In general it is an Art and a Science of making Personalized Medications, this is what we call Compounding.
Pharmacy compounding known as the art and technology of preparing customized medications for people and pets who are ill. Compounded medicines tend to be made from scratch so to speak – ingredients are mixed together at the exact strength and dose required specifically for each individual patient. The important thing here is this enables the compounding pharmacist to create personalized medications to satisfy an individuals particular needs.