This is the ValueSet that contains all the codes in Combined Dose Form (http://hl7.org/fhir/ValueSet/combined-dose-form) and Pharmaceutical Dosage Form Terminology (http://hl7.org/fhir/us/pq-cmc-fda/ValueSet/spl-pharmaceutical-dosage-form-terminology). E.g. what you have to deal with if you get resources containing codes in either of them