"i&#039;ve used this on &amp; off for chronic pain and other health conditions.  i find that, for me, it&#039;s the only thing that takes the edge off without bad side effects.  however, i recently filled a prescription and was given a form by a new manufacturer - actavis pharma.  they have bought out watson and changed the formula.  shortly after taking one, i was extremely nauseated and had a horrible headache.  it made my pain much worse; i was in bed most of the day.  the pharmacy i go to only prescribes this brand now because it&#039;s cheaper.  there are numerous complaints online from people having bad side effects like i did.  the pill id is 2172.  if you&#039;re given this brand and have problems, please report it to both the fda and actavis."