a lot of autistic people have an excess of serotonin in their blood and this is proven to cause social anxiety
whenever I take drugs that rape my serotonin receptors like LSD or MDMA, I always feel zero social anxiety irl for a few days after that.
propranolol is a very good nonbenzo anxiety drug because it not only is a beta blocker, but it also antagonizes serotonin receptors. I try to take propranolol whenever I have to do something particularly social and it works like a charm, makes my life so much more bearable tbh and it’s completely nonaddictive and benign—people take it for blood pressure.