Old Hollywood's Elite Were the Last to Use LSD for Therapy 10 years ago
Please do not take this recommendation.
That is certain to make you face a lot of uncomfortable irrealities, but let's not conflate that kind of "being tripped out" with the sort of introspective, lucid and refrshing experience LSD can give one.
(Edit: let's be clear, DXM+DPH is taking a very dirty but powerful dissociative and a schizophrenia inducing deleriant. That is not a road that leads to self analysis and catharsis, but paranoia and confrontation.)
You could "trip out" on DXM and DPH. I've done it more times than I ought to have. But it's a far cry from the beautiful mind state that is "tripping".