"i&#039;m a 48 year-old male, 6-2, 230lbs. i&#039;ve been taking klonopin off and on now for the last year. it works pretty well for anxiety and takes about 40 minutes to kick in. i take 0.25mg twice daily. i just started taking lexapro 20mg and have been on it for about four weeks. not sure if it&#039;s doing much. we&#039;ll see in about another 4 weeks if i can stop the klonopin. i have to agree with others, xanax works well and quickly, but leaves your system quicker and leaves you more anxious. klonopin seems to be a little bit smoother and longer lasting about 3-4 hours at 0.25mg. this medicine gets a bad rap due to the people who abuse it. i&#039;m in law enforcement and i see it every day who abuse these."