Hello, I ve been on liothyronine for a few years. My new doctor added levothyroxine because she said she never prescribes liothyronine by itself. After a few days of taking the levothyroxine, I developed a major rash on both of the lower part of my legs, which went away after discontinuing. Recently, on the liothyronine alone, I ve been experiencing shortness of breath, tightening in my chest and rashes and itching on both forearms. Is it possible that I am allergic to medications for hypothyroidism? If so, what can I take? Thanks, Pam C.