"klonopin is the best benzodiazepine in my opinion for any sort of anxiety disorders. it helps me the most i have sad gad and ptsd. this medicine lets me feel calm, at ease, and i can speak my mind. .5mg is all one needs and it lasts about 8 hours for me, and the long half life keeps my anxiety levels lower than usual if i don&#039;t take it the next day."