I thought they were mutants? The whole getting powers from drugs I thought was something they were working into the story to separate it more in the new Freeform live action series? In the comics I *think* drugs may have awakened their powers, but they were always still considered mutants to the point of joining the Dark X Men undercover during Siege. 

[img]http://static2.comicvine.com/uploads/scale_medium/11/117763/3103524-darkavengers00801.jpg[/img]

~KL~