Only those that can be used for drug_concept_id in DRUG_EXPOSURE and DRUG_ERA, and hence are
- Valid
- Ingredients, Clinical/Branded Drug Forms/Components, Clinical/Branded Drugs and Clinical/Branded Packs. We added Quantified Clinical/Branded Drugs, which the NLM have de-facto but not explicitly as a TTY. And we have the equivalent Groups, even though I don’t like them.
Brand Names, Dose Forms, Precise Ingredients are not. Multiple Ingredients (MIN) we haven’t even incorporated (to some people’s chagrin).