Tuhia he tomokanga mō tēnei wāhanga - I te marama o Mahuru 2011, i whakamātauria a Horakova mō te clenbuterol i te wā e whai wāhi ana ia ki te eke pahikara maunga e whā i te Whakataetae o te Ao. I te 28 o Pipiri 2012 i whakatauhia e te Union Cycliste Internationale te whakahau i a Horakova kia whakakorehia mo te rua tau mai i te UCI World Championships
, me te mea nui ake, mai i nga Taakaro Orimipia i Rānana, ahakoa i karangahia e te Czech Cycling Union i mua ake o taua tau.