| A | B |
| Drug | a substance which changes the way the body or mind works |
| Prescription | medicine obtained only with a doctor's note |
| Over-the Counter | medicine purchased without a doctor's note |
| Medicine | drugs used to prevent or treat diseases |
| Side effect | a reaction to a medicine that was not intended |
| Addiction | a physical or mental need for a drug |
| Drug abuse | taking too much or using an illegal drug |
| Inhalants | substances whose fumes cause drug effects |
| Nicotine | an addictive tobacco substance which speeds up the nervous system |
| Tar | a dark, sticky substance which can cause cancer |
| Carbon monoxide | a poisonous gas inhaled while smoking |