muscle spasm
"It only made the pain in my arm mild.  It did not go away.  I am in school and do a lot of typing and my arm, shoulder and sometimes fingers experience lots of pain so my doctor gave me these pills.  They do not work well for me because I still feel the aches and pain just not as bad.  When I take two, I get sleepy, take a nap then I can operate almost pain free for at least 4-5 hours."