I don't think it's as speculative as some selling at this level would assume it to be.
It is VERY possible IMO that this drug is coming back on the market. The problems with it are highly suggestive of some sort of allergic reaction and that can be addressed several ways IMO.
Call an allergist in your area and do some DD on this and they'll tell you that the way they commonly test is with a simple skin test. That could be made to be a condition of this and put on the label for example.
Again..not tryng to give false hope here but I do think the odds here of a return are not as bad as some might make it out to be.
And if it does come back..this stock is opening at 15.00. And so..the risk /reward here is very considerable.