I think haidut posted a study saying a single 40mg dose of propranolol before doing something you find fearful can help eliminate the fear response completely for the next time you have to do it, forever.
found the post:
https://lowtoxinforum.com/threads/blocking-stress-adrenaline-just-once-cures-ptsd-and-maybe-any-mental-disorder.28622/
40mg propranolol 1 hour before the fearful event and then get a good nights sleep afterwards.