I've been merrily picking up my carb and propanalol from the chemist and not paying for them as I was told that thyroid medication is free on prescription. Went to pick up the last lot and it transpires that it's not free if your overactive only free for under active. does anyone know why? I asked the assistant and she claims it because carbimazole is used for a variety of conditions but I've not come across any other condition it used for other than overactive thyroid. Crazy world !