I too suffer from back and leg pain. I have had 3 surgery's pain stimulator implanted as well. The back and leg spasms have gotten so bad starting around 2pm till I wake in the morning. Some nights I'm up all night. Started medicines as directed 1st time. But had some very strange reactions. Like I couldn't breath, almost paralyzed, then hives. So I stopped. But the spasms became so bad, I just couldn't bare to go on anymore this way. I started again taking 1/2 a pill 2 times then 3 times. So far I just itch, I can deal with that. It is helping with spasms, that is the best part of all. And OMG if it also helps with migraines, that would be even better, since I am also being treated for them as well. Life can be unbearable. Thanks for help.