Whats the longest you can take ativan 0.5mg or sometimes 1mg daily to have any sort of psychological dependency or rebound anxiety and stuff like that?

Dependency can develop starting at 2 weeks of using Ativan regularly, it depends on the dose but also individual factors. Anxiety is the most common withdrawal symptom experienced after stopping benzodiazepines and it is a sign of dependency.

After about 2-3 weeks, tolerance may occur as an initial manifestation of dependency, and sleep may become far less refreshing. Anxiety may take a higher dose to control. If you are concerned of eventual problems, which are not by any means atypical, contact your doctor and discuss.