Performance anxiety. Performance anxiety is helped most by practice and rehearsal. Toastmasters can be a forum for this. Relaxation exercises help. I will often prescribe a low dose beta blocker as Propranolol that helps prevent tremors and increased heartrate, but it can't be used with asthma. Benzodiazepines need to used very cautiously as they can sedate and cause memory problems is used excessively.
Stay active. Exercise is a great way to relieve stress. Your body releases endorphins during exercise, which can help you feel calm. If you exercise 30 - 60 minutes a day, your stress levels can improve. When stressed, take 5 slow, deep breaths with your eyes closed, then roll your shoulders forward 5 times, then back 5 times. This will slow your heart rate and release tension in your neck and shoulders.
Are there any substances, medications, or things I can take to get rid of nervousness before a speech? Answer please!
Stage fright. The commonest medicine taken by performing artist for stage fright or before an important public speech is 'propranolol' or Inderal. It is contraindicated in people with asthma.