Regulatory guidelines

dear sir please tell me the basic difference in various guidelines like WHO,USFDA,MHRA,CFR,ISO

WHO guidelines are worldwide , it may be adopted by regulatory authority of the country if European or American guidelines are not adopted in the country if it is outside Europe and USA and if such country does not intend to export products to USA or Europe

FDA guidelines are important in USA and if the company wants to export products to USA

MHRA guidelines are important in Britain (in addition to European guidelines)

ISO standards are important worldwide and should be applied concomitantly in addition to one of the previously mentioned guidelines

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