"i just started this medication a few days ago and i am on 10 mg twice per day..i would have to say it works very well on my neck and back pain and my nauseating migraines which all result from a car accident and i&#039;m only 23 years old. i luckily have a very nice understanding doctor and know what i&#039;m going through and he has never turned me down when i&#039;ve needed an increase or change in meds."