Is there some property in RxNorm (and hence in Athena vocabulary; and in RxNorm Extension) that would allow a computational query for all biosimilars ever created?
I can try regex expression looking at “-wxyz” (where wxyz is any string, more like ssss) at the end of the generic name. But that seems not very “clean solution”.
For example rituximab:
And related question: (if solution in RxNorm exists):
How is RxNorm Extension representing biosimilars from different companies? (hoping it would use the same approach).
Or should I try it in SNOMED CT drugs? In US extension, I don’t see the “similars” there at all. Just rituximab (again, this is example). I am after ALL biosimilars. Not just this one example on which I am demostrating aspects of my problem.
(second example - looking at RxNorm extension Quant Clinical Drug.