This is reposted from another thread i posted in where the starter asked about daily marijuana use and DPD.
I haven't smoked marijuana often, but a few times and I have diagnosed DPD. I can tell you that it definitely makes the feelings worse for me.
By worse, I mean that it makes the unreality/disreality feelings much worse and things look unreal for hours at a time rather than just minutes or instances. My reality-testing sometimes gets out of touch and I have done incredibly reckless things while under the influence of marijuana in the thought that i was 'invincible' or that i was already dead so i couldn't die again. If you do decide to smoke marijuana do it with people who you know, trust, and like, and make sure they are aware that you might go a bit strange so they can keep an eye out (tell them beforehand, or simply be candid about your condition with them while you are sober and interacting normally in the weeks or days before smoking). Also keep it in a positive environment, as even with mentally "normal" people can be driven to paranoia if they smoke in a stressful or uncomfortable environment.
I have also used MDMA (Ecstasy) which for me alleviated some of the feelings of DPD and just made everything more real, but the new feelings of reality scared me so much that I haven't touched it since.
I know you talk about episodes of DPD, but for me it's a constant condition so my answers may be close to what you're looking for, but because i'm unsure of any research done on the subject, I can only give my personal accounts.
I'm not sure if DPD sufferers are more prone to addiction, and I am actually being treated for hallucinations and delusions with antipsychotics, i can say that they have and 'addicting quality' but I am not addicted persay. I take my antipsychotic before bed and it honestly feels like 'the crazy is coming back' if i go too long without taking it, which is why i say it has an addicting quality. Now that i'm on medication i feel like i need it and that if i don't take it my mental health will come crashing down around me.
I hope this helps, good luck in your studies