Non-selective beta-blocker. By blocking peripheral β-receptors, it suppresses the physical signs of anxiety: racing heart, tremor, sweating. Used off-label by performers, public speakers, and anyone facing anticipatory anxiety.
Dose: 10-40mg, 30-60 min before the event.
Caveats: Don't combine with low blood pressure. Not for asthmatics. Doesn't address the cognitive/emotional component of anxiety.