WHAT ARE DRUGS?

1.DRUGS ARE CHEMICALS OF LOW MOLECULAR MASSES (100-500u )
2.THEY INTERACT WITH MACROMOLECULAR TARGETS AND PRODUCE A BIOLOGICAL RESPONSE
3.WHEN THE BIOLOGICAL RESPONSE IS THERAPEUTIC AND USEFULL , CHEMICALS ARE CALLED MEDICINES AND ARE USED IN  DIAGNOSIS , PREVENTION AND TREATMENT OF DISEASE.
4.USE OF CHEMICALS FOR THERAPEUTIC EFFECT IS KNOWN AS CHEMOTHERAPY.

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