"indigogirl,
switching from ativan to klonopin is very common. due to the fact that klonopin is 2x more potent tand lasts much longer also. 2mg ativan = 1mg klonopin. ativan has a 12-18 hour half life, while klonopin has a 24-50 hour half life. ativan peaks within 30 minutes, while klonopin peaks within 2 hours. if you were too sleepy with the switch, your klonopin dose was too much. for me, klonopin is the best all around benzo. i&#039;ve been on xanax, ativan, and valium, klonopin is the king of the class of benzodiazepines."