I can't really say it would be 'safe' but I don't see how it would be any more dangerous than either of them alone.
Friend of mine smoked crack on DXM and described it as a rush with full dissociation.

On second thought you might just want to not do so much cocaine to start, just do like a line and see how it goes.
Nullific Reviewed by Nullific on . coke and dxm? wood it be safe to do coke if im tripping on dxm? Rating: 5