Oxyphenbutazone is a nonsteroidal anti-inflammatory drug (NSAID). It is a metabolite of phenylbutazone.
It was withdrawn from markets worldwide in mid-1980s due to bone marrow suppression and the risk of Stevens–Johnson syndrome.
The word “oxyphenbutazone” is, theoretically, the highest-scoring word under American rules for Scrabble, with a maximum possible score of 1,778 points. (not sure of the 320-point discrepancy between my original research and this article)
Vulcan Stev's Database 