What are drugs?
A drug is any substance that causes a change in persons physical or mental state.
Some drugs are used by doctors to treat sicknesses, though after recovering sometimes they are addicted and take other means to get those drugs.
If you do become addicted you will want to seek help ASAP to keep future issues away.
Drugs if taken from non-legal sources cause issues and can cause death. If you have a friend going through drug issues, contact an adult, or someone trained to deal with drugs ASAP.