Thanks for the suggestion MrsD, I will pick it up today and give it a try if he has another episode like the one he had last night. This total body muscle cramping is a new symptom, so I put a call in to his neuro for advice, or to see if there is something he can recommend or prescribe for my son. Sheesh, this situation is taking a toll on the both of us, there was absolutely nothing I could do to soothe his pain last night, he was begging and pleading with me to make it stop and I was debating about whether or not to call 911 and bring him to the ER, but after 3 ER visits over the past 5 weeks, I already know the drill ("ER isn't the place to diagnose neurological illesses, he's not sick enough to admit him, etc etc")

Thanks again for the advice. Can't hurt to try it.