Is Skelaxin Pill Advisable For Muscle Spasms At The Base Of Skull?

My daughter is 24, on Humira and Sulfasalazine for a seronegative rheumatoid-like polyarthritis. She is having a horrible muscle spasm at the base of her skull causing a terrible headache. No pain reliever has touched it. I was wondering if I could give her one of my Skelaxin pills to help her.