alright. i'm at least superficially familiar with UMLS. i'm deeply skeptical that things like going from the concept of "medicine" or even 'medications' to a truly useful subset of terms is ever really going to do anything terribly meaningful from such a huge meta-database like that, or even if you start from 'smaller' subsets like SNOMED only. I get the ease of a single format, but if it's not retaining any sort of hierachy or relationship between terms then it seems you're losing a primary point of having such a thing. seems to me that the power of this vocabulary comes when it can be used for intelligent search/filtering - and you need more than just synonyms to do that right. i'm be a little worried you're getting this giant list of terms without any good way to use it.

if it's not being worked on, then this can be picked up at some future time though.