Chemicals and products should be designed that they are optimally effective, yet have little and no toxicity.

When any medicinal formulations are put in market, they are put first on trial to check their toxic effects on humans.

If to be found toxic then alternatives are prepared keeping in mind the function of medicine but only toxicity reduced.

In many insecticides like DDT, gamaxine, aldrin etc.which are found toxic to humans, the use of this is curtailed and alternatively biological pesticides are more in use.