Holy mother! Dextromethorphan and pot do not even compare, in terms of effects. That said, I am glad you found it to be of use. My several experiences with DXM did not have such positive effects, so I have learned something here.
It's also worth noting that DXM is a dissociative drug, and like all dissociatives (ketamine, PCP, etc.) it causes measurable brain damage each and every time you do it. This effect is compounded if you don't take a break in between usages. This is in no way a condemnation; just be sure you measure your risks and benefits accordingly.
There is no way you can take it as often as pot. It's not a daily drug, of course. For me, I use it about several times a year. A couple of months is usually enough for clutter and stress to gather down so I can clear it all up with a disassociative.
So far (about a year of usage) I find that the positive outweighs the negative.
PS. I'm also learning how to "astral project" (I put this in quotes because I just think it's a natural disassociative, not a spiritual experience). So far, I found AP to be much more powerful (albeit much shorter too) than the second plateau of DXM and I intend to stop drinking disguisting syrup completely as soon as I gain enough practice with AP.
It's also worth noting that DXM is a dissociative drug, and like all dissociatives (ketamine, PCP, etc.) it causes measurable brain damage each and every time you do it. This effect is compounded if you don't take a break in between usages. This is in no way a condemnation; just be sure you measure your risks and benefits accordingly.