On 100mg of levothyroxine. now confirming it is causing rash on neck/breast/chest and scalp itch. cant see my doc until 2 mths. why is this? no allerg

Drug allergy: Levothyroxine is the generic name of a type of thyroid hormone, which several different companies make. It is possible that you are allergic to one of the nonactive ingredients (filler/coloring) in one maker's pill, but not another, especially if you took this medicine in past without difficulty. Ask your pharmacy if generic maker was changed recently. Rarely, u could be allergic to levothyroxine