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Harmful substance

  1. Harmful substance – is under certain conditions capable to influence an organism, leading to a deviation in the state of health or to a disease;
  2. Harmful substance in a work security system – in case of disturbance of safety requirements at contact with a human body can lead to the production injuries, occupational diseases or deviations in the state of health revealed by modern methods in the course of work or in the remote terms of life of the present and succeeding generations.
 
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Many drugs initially moved ahead in the market as drugs. Heroin, for example, was initially brought to the market as children's cough medicine. And cocaine was recommended by doctors as anesthesia and as the means increasing endurance.