Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. Yes, beta- blockers work best in cases of anxiety or nervousness when a person may feel discomfort due to heart pounding or sweating. This ca be overcome with beta-blocker. But, do not get addicted to it, you can use it as a self help at times. To avoid stage fear, prepare your presentation before time, rehearse in front of some near & dear one, or in front of a mirror. Try to get confident first, sleep well so that your anxiety is not triggered, focus on the material. Get mentally set & you will do well. A week before the day of your presentation start eating yoghurt, fresh fruits, berries, take juices to get yourself properly rehydrated. Avoid addiction & hot spicy food for it may trigger anxiety. Stay calm & confident. Hope I have answered your query, all the best. Hope I have answered your query. Let me know if I can assist you further.