Sertraline
"I've been suffering from generalised anxiety but especially at work..for around two years. Previously taking citalapram, I stopped due to side affects. Initially wary that these would be the same or worse. But 4 weeks into treatment. I really am back to my old self, Happy to enjoy life rather than being anxious all of the time. What's more, my work performance has improved, relationships are much more fulfilling for me and them. I exercise more, eat healthily, and generally my cognition is calm and clear. 
Few side affects.. Slight sleep disturbances, jaw clenching, and thirst...all now reduced and are easy to live with considering the benefits."