Flu medicine symptoms and conditions

I began taking ultracet for undiagnosed backpain a little over a year ago. I'm over 6 foot tall and weigh over 200 pounds so I take 2 pills before each work day. It has been a miracle drug for me in helping with not only the back pain but all sorts of pain that comes with being a waitress. Unfortunately, Ultracet makes me very hyper, talkative and somewhat euphoric and I can no longer go to work without it. I never take it on my days off and I believe that when I take it for a string of days in a row that my body stops producing as much adrenaline and I feel very tired and slightly depressed. It also causes a lot of itchiness. Never mix this drug with cold and flu medicine, it made be very ill! I am not bothered enough to stop taking this medication but to potential users be wary of its potential side effects.