allergic (uh-LER-jik)—to have a bad reaction to something that doesn’t bother most people. For example, some people may get hives if they are stung by a bee.

pharmacist (FARM-uh-sist)—a person who has special training to fill prescriptions and teach people about their medicines.

side effects—symptoms that come from taking a drug and are not part of the treatment. For example, some medicines can make you feel sick to your stomach.