"Seems maybe many people searched on those two things many times (brilacidin & CTAP) and Google made the association?"
That's it for sure. But when I search for a term and get linked to a website page I expect the term to be on there. I just tried the search with "brilacidin" in quotes and by golly I got results that were limited to pages that actually included the search word.
Thanks for making me do that :o) It was worth doing.