I take percocet 15 mg every 4 to 5 hours and 5 mg at night. I don't know what I would have done without it. I was in horrendous pain with electrical shocks like I had been plugged into an electrical socket. I had myofascial pain that had not been treated; it took almost 6 months to complete my pain management regimen of once weekly injections and twice weekly physical therapy which always included some myofascial release. I am now in very little pain

and am weaning off percocets 5 mg. a week.
There are some drawbacks, the biggest being dependence which is not the same as addiction. Dependence is physical and addiction is psychological. There have been many tests done that prove that most people with FMS only take it for pain. I suggest that you use the least amount possible to help with your pain. Keep some stashed for when you flare. My pain doctor told me this. Keep your medicine in a safe place, sometimes other people might take it and then you run out early, which is a red flag to your doctor (and also illegal) and can harm your relationship with your doctor. Yes it happened to me. Also, you will get constipated. I take docolace every night and I only go to the bathroom about once every 4 days or so. If you don't take the percocet on time, you will start getting achey, very achey like the flu. I have to have a paper scrip and my doctor mails them to me. I am looking forward to getting off of them completely. I also don't like the fuzzy feeling and its difficult for me to read due to blurred vision. Anyway, I won't need them as long as i take it easy on my body.
If you develop a dependence on them it can still be worth the pain relief. Yes some people think its just terrible to take narcotics. But thats what they are for. Pain. duh. Anyway, you just can't walk around worrying about what other people are going to say. Its really none of their business and with FMS you might as well get used to people disagreeing with your treatment, exercises, vitamins, etc. Its your life and your body and only you and your doctor know whats best for you.
Hope I helped and sorry you are in so much pain.
Donna