Propranolol
"I had PTSD and arrhythmia and years of seeing psychologists, antidepressants, sedatives, even valproic acid, nothing did much of anything good and the side effects didn't outweigh the minimal improvement (improvement being sedation), when I tried propranolol I wasn't expecting much. I took my first tablet and forgot about it, it kicked in on the train and the effect was profound. For the first time I became aware of how much tension I'd been holding in my muscles, how I'd continuously scan for the possibility of threat, I had no idea I'd been doing this only that I'd felt on edge. I felt like I'd been holding my breath for years and had just been allowed to exhale, nothing else worked for me and I was at the end of my rope, propranolol was a life saver."