First of all welcome to the nexus.

I'm curious to your aversion to LSD, are you aware that any risks associated with LSD are also usually associated with other psychedelics including DMT?

That being said, LSD is one of the safest substances you can take. The risk of flashbacks is extremely low, and I've even heard that these reports are unconfirmed.

DMT does raise heart rate and BP in the short term, but not by any amount considered dangerous for most people. If you do have high BP or heart conditions though I wouldn't recommend it.

Overall psychedelics are very safe substances, much safer than alcohol and tobacco IMO.