For stress I think it is better 2mg-4mg of Diazepam [valium] at night prior to bed is better and it's been around a long long time...warning slightly addictive
and don't take if pregnant
..
For people without hypertension 'normotensives' or people with heart conditions, beta-blocker can result in dangerous drop in BP...careful with those...and they also make you 'High'
For stress it is best to do otherthings such as meditation, accupuncture, etc....
...Or Turbopropellor Aircraft Filed At 250 Knots or Greater
rhov