WIth drug-induced DP, if it is a different mechanism than standard DP, then I would recommend seriously looking at how Risperdal and similar anti-psychotics have had strong negative effects on individuals with drug-induced vision disorders. This is documented in the literature on numerous occasions:
Here are some references:
Is there a role for the alpha-sub-2 antagonism in the exacerbation of hallucinogen-persisting perception disorder with risperidone?
Authors: A. G. Alcantra
Journal: Journal of Clinical Psychopharmacology 1998, 18:6, 487-488
LSD-Like: panic from risperidone in post-LSD visual disorder
Authors: H.D. Abraham and A. Mamen
Journal: Journal of Clinical Psychopharmacology 1996, Vol. 16, No.3:238-231
Here are some references:
Is there a role for the alpha-sub-2 antagonism in the exacerbation of hallucinogen-persisting perception disorder with risperidone?
Authors: A. G. Alcantra
Journal: Journal of Clinical Psychopharmacology 1998, 18:6, 487-488
LSD-Like: panic from risperidone in post-LSD visual disorder
Authors: H.D. Abraham and A. Mamen
Journal: Journal of Clinical Psychopharmacology 1996, Vol. 16, No.3:238-231