Drug
Drugs act differently in different amounts. It is therefore important to take the right amount. The amount of the drug taken is called a dose. Aspirin is often prescribed against fever, or as an analgesic. One of the side-effects of Aspirin is that it makes the blood thinner. For this reason, it can also be used to prevent strokes, or heart attacks - in a much lower dose than the one used to treat fever, though.