Muscle cramps and Humira

Anyone have any problems with muscle cramps and Humira?  I had such painful muscle cramp(charley horse) while sitting on the couch.  I had a cramp in my left upper thigh on the front and at the same time had one in the back of my right upper thigh.  I was stuck on the couch and couldn't get up due to the cramping getting worse as I tried to move!  My GI doc said that it is listed as a rare side effect and has a few other patients report muscle cramps also.  He said to keep a log of when it happens and time wise of how it is related to the Humira shot. I had this particular episode two days after my Humira shot.   I really hope that this is not a side effect and maybe that my muscles were just fatigued after working two twelve hour days in a row...

I went a couple of days past my injection date of humira and took it.  The next day I had cramping in several parts of my body.  The most severe was my stomach.  I started drinking Gatorade and water right away and it helped a lot.