Drug Dependence In order for a chemical to be considered a drug it must have the capacity to affect how the body works--to be biologically active. No substance that has the power to do this is completely safe, and drugs are approved only after they demonstrate that they are relatively safe when used as directed, and when the benefits outweigh their risks. Thus, some very dangerous drugs are approved because they are necessary to treat serious illness. Digitalis, which causes the heart muscle to contract, is a dangerous drug, but doctors are permitted to use it because it is vital for treating patients whose heart muscle is weak. A drug as potent as digitalis would not be approved to treat such minor ailments as temporary fatigue because the risks outweigh the benefits. Many persons suffer ill effects from drugs even though they take the drug exactly as directed by the doctor or the lab....

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Number Of Words: 417

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