For extacy, I would about 14days.

With DXM(ugh!) I suggest not taking it ALL! But that's just me, but I wouldn't take any quite yet. It's not the same as Ex, it won't block the effects but rather make you sick, or it could be lethal. Research on the net BEFORE you take any DXM. Some anti-depressants mixed with other drugs can be highly toxic and lethal. I would wait 14-30days. Be careful, with the Ex too.