Page History

...

Concepts with product strength that is "not equal to" are modeled as primitive, with attributes added as described in the corresponding subpages, except that strength numerator attributes will not be added.  The appropriate Medicinal Product Form-only (MPF-only) concept will infer as a parent.

Product strength numerator values

Expression of product strength in metric units is preferred.

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

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

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:

• • 408165007 |Mega u (qualifier value)|

Repeating decimals are rounded to three decimal places (with 5 and above rounded up and 4 and below rounded down).

Precise active ingredient

...