I had back surgery 4 days ago, and this is the medicine I was sent home from hospital with. Can you tell me what these names mean? I am perscribed 5mg take 1 or 2 every 4 to 6 hours? This medicine isn't helping very much, is there a dosage that would help more, or is this the only dosage that can be given for Lumbar Lamectomy at 2 levels.