I've been taking Ultracet for over SIX months, usually twice daily and sometimes 3 times a day. I herniated a disk a couple years ago and I've had two back surgery since then and have taken every type of prescription drug available, Perocet, Oxycodone and now Ultracet. Ultracet does help with the pain, but it's side effect are just as much of an issue as the scatic nerve and back pain. My main issue is dizziness or being woosey on a daily basis and I do get an upset stomach on occasion. I only drive short distances because of the dizziness and probably shouldn't drive at all. What concerns me is the length of time I've been taking Ultacet. I do believe Ultracet is habit forming or additive no matter what anyone else may say. I need to get off this drug, soon.