I have a lot of experience with anxiety, panic, stage fright, depression, alcohol, and drugs.
Alcohol and drugs (of any sort) are the worst way to deal with it. They only mask the symptoms, while making them worse.
The best way to deal with it is finding holistic solutions. There are many, but it takes a willingness to sit through some really uncomfortable, and scary feelings.
The quick list-- diet, exercise, relaxation exercises, prayer, lots of water, eliminating sugar and processed foods, coffee and other stimulants... And most important, reaching out and seeking help.