Your right! I take levoxyl name brand as I have tried the generic and I coughed my head off for a year before it dawned on me what was wrong. I told my doctor about it he wanted me to get chest x ray, nothing was wrong, I eliminated some supplements I was taking and still had the coughing only one left that could be doing it, after I told my doc about it he said sometimes the coating on the pill can make you cough. Now I find any food that I am allergic to will make me cough. I have been taking calc/vitamin D and I haven't noticed any lip tingling. I will keep taking that. I have also noticed my bones hurting more, you might be right on the low calcium. My one toe is curling, and one of my toes is trying to hide under the other one. It is almost time for a bone density scan.