Not true. As per what lukb4ujump says, the best estimate of when the DEA process will end is around the end of this month. For another couple of weeks, very little is going to happen to this stock, at least nothing event driven.
The DEA public comment period was up on Jan 18, 2013, they have up to 45 days to respond to the comments. When they complete that they will have 30 more days to make final ruling, remember that Eisai requested the final 30 days be waived.