Exercise and deep breathing. And I learned this long before I had an addiction problem. For me, burning up my energy pretty much makes it impossible for me to have anxiety issues. Reading also helped a ton when I was having severe panic attacks. But I don;t know what you are going through right now, but I do know doing things that make us feel better about living, makes anxiety/panic/stress fade away some. If it is very severe, see a Dr, but try these things first. Getting drugged up before attempting to work it out first is a mistake in my opinion, But if it is severe, see a Dr. I am not giving medical advice, just sharing that in my experience with these issues, these things worked for me and kept me from having to take any medication. And this was 20+ years ago
