Hello everybody i have just joined as always popping on site to check out the information. Underactive thyroid......been on 100mcg since 2005/6... always had side effects especially "anxiety" then even more so when taking "collegen protein powder" fantastic for "all" the body especially thyroid was on this for 14 months but now had to stop as my anxiety levels got worse so finally the doctor has dropped my dose to 50mcg but getting more side effects!! 14 days on 50mcg....so made an emergency call today to get the ok to stop this Levo until i can get a blood test they didnt say yes or no just some people do stop for a while..did ask a Pharmasist a couple of day ago and he did say a couple of days ok but just wanted the ok from surgery. This has been going on for years but blood test always showed "normal" and cholestrol ok. Exhausted with it all so blood test on Friday i hope and not taking anymore. Give me a break please!!!! i seem to have most of symptoms of too much T3 i find it all very confusing. For quite s while i was on "Erfa" natural but now NHS wont pay for it..so unless i see an endocrine consultant i will have to pay for it myself BUT that is the next step how we all suffer with this Thyroid? unbelievable!!!