Propranolol is a non-selective beta-blocker used off-label to treat performance anxiety by controlling the physical symptoms of stress, such as rapid heartbeat, shaking, sweating, and shortness of breath. Unlike anti-anxiety medications that act on mood or sedation, propranolol works peripherally, blocking the body’s fight-or-flight response—allowing individuals to perform calmly and confidently in high-pressure situations like public speaking, exams, interviews, and performances.