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Synonyms matching the FSN are not required. 

International Unit

International Unit as a description is arbitrary, and to be understood, each product requires reference to a particular bioefficacy specification for that entity.  Therefore, international unit is neither a meaningful nor comparable description at Clinical Drug level.  International unit will be represented as unit in Clinical Drug descriptions.  Abbreviations will not be used.

For example,

• • 1237145006 |Product containing precisely octocog alfa 1000 unit/1 vial powder for conventional release solution for injection (clinical drug)|
  • PT - Octocog alfa 1000 unit powder for solution for injection vial

The |Has presentation strength numerator unit| will still continue to have a value of |International unit (qualifier value)| even though unit is stated in the FSN and PT.

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• • Use milligram if value is <1000; if > then 1000, convert to gram.
  • Use microgram if value is <1000; if > then 1000, convert to milligram.
  • Use nanogram if value is <1000; if > then 1000, convert to microgram.
    
  • Use picogram if value is <1000; if > then 1000, convert to nanogram.

Similarly, if a unit is less than one, convert to a smaller unit.  gram → milligram → microgram → nanogram → picogram

For example, 

If the value is less than one gram, convert value to milligrams. 

To avoid semantically equivalent concepts, product strength for units are normalized as follows:

• Use million unit if value is >1000000 unit

The following units are not allowed unless specifically noted as an exception:

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