I love Ultracet!!! I have degenerative disc disease and a lumbar herniated disc, but have been resistant to taking pain meds due to the risk of addiction and also due to the adverse cognitive side effects. I do not feel sluggish or "fuzzy" and can perform my job without impairment-not to mention the pain relief! However, I do feel a bit hyper and euthymic, but for me that is a bonus!