Smoke less is good advice. But also, if you’re prone to panic attacks, try giving yourself one intentionally (when you’re sober) when you feel you’re in a good environment. Learning to mentally overcome panic attacks is probably one of my greatest accomplishments in life. Now when I feel one onsetting, I can completely come down from it. The key is in remembering two things: you’re actually going to be fine, and you’re in control if you believe you’re in control.