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".
What is your motivation for saying something like this? You can't possibly believe that LSD and DXM create a similar experience.
Everyone should be careful with DXM. Even after extracting the acetaminophen, noxious dyes, and stimulants that sometimes accompany DXM in cough syrup, it can make you very, very sick. I took around 1000 mg as a stupid teenager and violently puked bile with blood streaming out of my nose, burst thousands of blood vessels around my eyes and on my face, and then fell down a full flight of stairs. Not a great day, and not a great first drug experience.
https://psychonautwiki.org/wiki/DXM_%26_DPH_in_combination