close
    what is IU

    0  Views: 542 Answers: 1 Posted: 11 years ago

    1 Answer

     In pharmacology, the International Unit is a unit of measurement for the amount of a substance, based on biological activity or effect. It is abbreviated as IU, as UI (Spanish unidad internacional or French unité internationale or Italian unità internazionale), or as IE (German Internationale Einheit, Danish International Enhed, Swedish Internationell Enhet). It is used to quantify vitamins, hormones, some medications, vaccines, blood products, and similar biologically active substances.


    Many biological agents exist in different forms or preparations (e.g. vitamin A in the form of retinol or beta-carotene). The goal of the IU is to be able to compare these, so that different forms or preparations with the same biological effect will contain the same number of IUs. To do so, the WHO Expert Committee on Biological Standardization provides a reference preparation of the agent, arbitrarily sets the number of IUs contained in that preparation, and specifies a biological procedure to compare other preparations of the same agent to the reference preparation. Since the number of IUs contained in a new substance is arbitrarily set, there is no equivalence between IU measurements of different biological agents. For instance, one IU of vitamin E cannot be equated with one IU of vitamin A in any way, including mass or efficacy.


    Despite its name, IU is not part of the International System of Units used in physics and chemistry. The IU should not be confused with the enzyme unit, also known as the International unit of enzyme activity and abbreviated as U.


    In order to remove the possibility of having the letter "I" confused with the digit "1", some hospitals have it as a stated policy to omit the "I", that is, to only use U or E when talking and writing about dosages, while other hospitals require the word "Units" to be written out entirely.


     


    Read here>.http://en.wikipedia.org/wiki/International_unit



    Top contributors in Korea category

     
    ROMOS
    Answers: 8 / Questions: 0
    Karma: 330
     
    Colleen
    Answers: 10 / Questions: 0
    Karma: 285
     
    country bumpkin
    Answers: 2 / Questions: 0
    Karma: 135
     
    pythonlover
    Answers: 5 / Questions: 0
    Karma: 105
    > Top contributors chart

    Unanswered Questions

    Max10 - Trang Tải Max 10 Chính Thức Uy Tín
    Answers: 0 Views: 15 Rating: 0
    8kbetccom
    Answers: 0 Views: 13 Rating: 0
    alo789cz
    Answers: 0 Views: 18 Rating: 0
    Why do my head hurts when i wake up
    Answers: 0 Views: 23 Rating: 0
    Nhà cái 88 - Top 10 Nhà Cái Uy Tín VN.
    Answers: 0 Views: 23 Rating: 0
    > More questions...
    451222
    questions
    719337
    answers
    749125
    users