"huge improvement after a few days. been on this medication since june 11th, i&#039;m starting to feel unwell again i don&#039;t know if this med is failing. i&#039;m scared that i&#039;m going to relapse. i have been diagnosed with generalized anxiety disorder. a couple of weeks ago my gp prescribed zyban with escitalopram. zyban after three days gave me issues with tunnel vision. i will be asking for for another med to help with escitalopram for my increased anxiety and bad thoughts."