Sitting here with heat on thigh fm severe muscle cramp. Had one earlier in hand. Have had many probs with hands lately; thought it was carpel tunnel but pain seems to be randon in hand and fingers. The muscle cramps are unbelievably severe; didn't know about the loss of Calcium and B - good to know. Was taking Levothyroxine .25 with seemingly no effects but when TSH was still over 4.0, MD changed to .50 Levoxyl. Have been on it a month and have had nausea, bowel disturbances; irritable eyes; bloating, depression (which MD is offsetting with antidepressant), and SEVERE muscle cramps in places you wouldn't expect... hands, neck when I yawn, things, stomach, waist... it's awful. After hearing everyone else, I'm weaning off and doing more research. Thanks to everyone for sharing.