Distinct acute effects of LSD, MDMA, and D-amphetamine in healthy subjects (nature.com)

I sometimes feel that my psychedelic experimentation has permnantely (or close to) alteted my visual processing and other less tangible mental mechanisms in a negative way. I also falsely recognize people and faces in things that are not which often makes me jump like Cramer from Seinfeld. Psychedelics still hold such a special place in my heart.