Medicine is a word which relates to two concepts: 1) a drug or mixture of drugs,2) any science or practice concerned with sickness and health.
A doctor is a person who has been trained in medical science. In Britain every person is registered with a local doctor, known as a general practitioner (GP). The patients´ names are on the GP´s list, and they make appointments to see the doctor. A physician is a doctor specializing in areas of treatment other than surgery. If a patient needs to see a specialist, they first go to their general practitioner /obvodný lekár/ and then he will make an appointment for the patient to see a specialist.