Like BestKids, I've taken both. For me, Ativan works faster, about 20-30 minutes, where as with Klonopin, it takes an hour to work. But Klonopin seems to be stronger....But Ativan is also okay. I guess I prefer Ativan because it is quicker in acting. If I'm really climbing the walls with anxiety, I want fast relief, not an hour of waiting.

Ativan was prescribed to me first. A different doctor prescribed Klonopin to see if it worked better.

I am only supposed to take them "as needed" and certainly not daily. I worry about dependence or tolerance, which probably increases my anxiety. Then, it's a vicious cycle. I have this conversation with myself, "Am I anxious enough?" "Should I take it"?

Anyway, I take either/or...depending on how bad my insomnia or anxiety is. One thing I can say is that I CANNOT take either in the middle of the night, only at bedtime. They both knock me out, and I need at least 7 hours to "sleep it off". The both leave me with a slightly groggy feeling in the a.m, but it wears off in about 5 minutes!

I don't notice any side effects, except maybe occasional short term memory loss??? I don't know. That could just be my age.

By the way, the dosage is only 1/2 milligram in each tablet, and just one tablet knocks me out.