I have just registered on this site, thanks for letting me join. What brands of Levothyroxine are there please. From diagnosis in 2013 to August 2017 I was on Actavis which my endo has said doesn't seem to help my levels but started taking Teva and since taking this been feeling light headed and stomach feeling unsettled and empty. Also levels going all over the place and this has made me wary to increase in case I go over medicated or feel sicker. This has left me bed bound from how ill I have felt. Possible side effects from Teva? Many thanks for advice.