Intersection of http://hl7.org/fhir/us/core/ValueSet/us-core-medication-codes and http://cts.nlm.nih.gov/fhir/ValueSet/2.16.840.1.113762.1.4.1010.4
This is the ValueSet that contains codes in both US Core Medication Codes (RxNorm) (http://hl7.org/fhir/us/core/ValueSet/us-core-medication-codes) and Medication Clinical Drug (http://cts.nlm.nih.gov/fhir/ValueSet/2.16.840.1.113762.1.4.1010.4).