hi have a good read through this link from webmd covers your problem. <link> as for the nausea its a side effect. hope this helps you. good luck
what is the difference between liothyronine and levothyroxine? . i have just completed a thyroid removal and a radiation treatment. prior to the radiation i was on liothyronine and now i have been put on levothyroxine. this new med makes me nauseous.