a sign of an illness that presents in a person and shows that a person is sick

a person who is receiving medical care, or who is cared for by a particular doctor or dentist when necessary

to use drugs, exercises, diet etc. to cure a person with a  disease or heal an injury

the act of putting a liquid, especially a drug, into a person's body using a needle and a syringe

a small solid piece of medicine that a person swallows without chewing

something that makes someone who is sick healthy again

a drug that is used to reduce or remove physical pain

any natural or artificially made chemical that is taken for pleasure, to improve someone's performance of an activity, or because a person cannot stop using it

a doctor who is specially trained to perform medical operations