Thanks for the response guys.
Just to clarify, it's not something I will use on duty.
It's something i would use when around lots of people on a day off, feeling tense and anxious, once a month or so.
I randomly get anxiety and a feeling of panic attacks when socially around lots of people (something that i've always had to deal with but not done anything about), and something that does not happen often.
I will definitely consult somebody and get back to you guys on what was said.
Thanks!