Im flying soon and will be taking a valium. Ive already tried it (4mg) and its OK...though it doesn't seem to stop the anxious thoughts...just blunts the effects. My psych recommended beta blockers instead. How do they work? Which symptoms of anxiety do beta blockers target? Ive heard they can cause heart attack even though they are often given to heart attack patients. My biggest fear about flying (even if it is irrational) is that I will freak out and have a heart attack mid-air....not good baggage to take on board. Pls help...again.