Ativan is a fast acting, fast to leave benzo, so its risk for tolerance is pretty high.
Taken once or twice a week, I dont see to much problems in it "it all depends on the person"
But if you have to take it more then that, I would suggest you talk to your DR about a maintenance benzodiazapine, with a longer half life, that will stay in your system with less risk of tolerance, and bad withdraws.
Side effects can basically be everything, lol when I took it, it made my chest numb "not in a scary way, but a funny way"
tiredness, lazyness, are the main side effects
Yahoo health has a pretty good comprehensive list.
Just started Ativan also would like to know if there is side affects also ...Is it workin for you Im on .5 mg ..Sorry couldnt answer question but it what im also dealing with
thanks good luck