Methocarbamol
"I was told as a youth and treated as a Rheumatoid patient
Muscle spasms in the legs and feet were always a problem. Rest, massage, and very warm water soak's. 
Now, I'm over 70' and doctor put me on long term Methocarbon which swells my tongue and puts sores in mouth, and changes my taste. I some times get dizzy and lay awake nights partially asleep. I'm tired a lot and just can't get energy up. Or care. What do you think. Should I change Rheumatolgist?"