Pharmacology is the science of mixing and dispensing of drugs.
Pharmacists study the chemistry of the drug, its origin, procedures for developing, preparing and dispensing it. A pharmacist is someone who is trained and licensed to prepare and mix ointments, powders, pills, tablets and injections upon the prescription of a medical practitioner or a dentist. Pharmacists work in a variety of areas. They are also in charge of adjustments in the weight percentage of chemicals in the production process. Since this function is increasingly being done by computers, only a supervisory role exists for the pharmacist.