| A | B |
| Drugs | substances other than food that change the structure or function of the body or mind |
| Medicines | drugs that are used to treat or prevent diseases and other conditions |
| Prescription | medicines that can only be sold with a written order from a physician |
| Over-the-Counter Medicines | medicines that are safe enough to be taken without a written order from a physician |
| Vaccine | a preparation of dead or weakened germs that causes tie immune system to produce antibodies |
| Antibiotics | are medicines that reduce or kill harmful bacteria in the body |
| Antibodies | are proteins that attack and kill or disable specific germs that cause diseases |
| Side effect | any effect of a medicine other than the one intended |
| Tolerence | a condition in which a person's body becomes used to the effect of a medicine and needs greater and greater amounts od it in order for it to become effective |