DXM & LSD cross tolerance??

[tip]

Has any swimmer noticed there is a significant cross tolerance between the 2.

Swims dinosaur tripped on high quality blotter which was pure lsd. Had a good trip then the next day robotripped and had been absent from dxm for 2 weeks. Usually the dxm would be full on but swim noticed lack of euphoria and visuals, leaving the swimmer apathetic. Same as if swim had been using DXM everyday beforehand.

Does LSD have any sigma agonist activity or any effect on the NMDA sites?
There is defiantly a similar feeling between the 2.

And vice versa swim has notice prior heavy DXM use leaving LSD to feel weaker than usual.