"i have suffered from anxiety and depression for much of my adult life.i have tried almost every option &amp; medication available. 
my first experience of sertraline was just over 2 years ago,it was a breath of fresh air,&amp; i felt fantastic.my happiness &amp; quality of life improved beyond recognition.despite being sceptical, i stuck with 100mg dose(8mnths),&amp; continued to feel the benefits.
due to my new found joie de vive i decided to give up on the treatment. unfortunately after a month or so i noticed a change in my feelings,&amp; gradually became more and more withdrawn.this trend continued. 
3 months ago i started on sertraline again, &amp; it&#039;s been just as amazing. incidentally i was also found to be gluten intolerant which can magnify depression"