I have found DXM to work with consecutive dosing, but i have heard for others it isn't quite as effective. It's hard to say, a lot of different reports come from this substance. Redosing dissociatives is notoriously bad for your brain, however. Just don't make a habit of it. The damage comes with really high doses or prolonged trips. I personally don't see/feel the harm in doing a small 2-3 dose binge on it once in a while, but it is a controversial topic to say the least.