I just want to add a word of caution to those who are considering psychedelic use to address tinnitus.
Psychedelics can have a negative/dangerous side. One form of this is HPPD as mentioned previously in this thread. (
See also this New Yorker article.)
My tinnitus specialist theorizes that my current tinnitus may have been caused by my one time use of certain psychedelics (in CDMX months ago), as I seemed to have developed mild HPPD symptoms right after. Do your research and proceed with caution if you're determined, because it could make things worse.
Definitely avoid psychedelics if you have mental health conditions such as psychosis, bipolar disorder, schizophrenia etc.
For those who are determined, Vancouver, British Columbia actually has Ketamine therapy clinics among other psychedelics supports and networks.
I both revere and fear psychedelics now. I'm excited to see additional research in this space to see how it can improve people's quality of life.