I've been avoiding Caffiene every time I have anxiety attack episode (which is from opiate WD.) So I feel anxiety and suddenly stop all diet coke
and coffee cold turkey, feel like hell with flu like symptoms and anxiety for days, then feel better and start to drink Caffiene.....and repeat.
I just looked up Caffiene withdrawal and among others mood swings, depression, anxiety, insomnia, fatigue and flu symptoms are some things listed!!!