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Adverse effects from a drug depend on the pharmacology of the active product and its effect on the receptors its meant to interact with. Genes of every person are unique and produce unique proteins. These proteins in turn make up many of the receptors of the human membranes. The interaction with various drug elements can therefore be predictable in a large number of the population. However, a small number may not exhibit the same interaction and can respond adversely to a specific medication. Many medication have common side effects that occur with varying degree in all the people taking it. Some people may have effects that are totally unpredictable such as a severe anaphylactic reaction to a drug that may cause minimal trouble in the majority. Yes, some people can have a more sensitive immune system that is not very tolerable to external agents such as drugs.


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Dr. M.S. Khalil

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