"it worked well at first. i was on 1 mg as needed after being diagnosed with m.s. i built a tolerance very quickly even though i was only taking 1 pill 2-3 days a week. soon i needed 2 at a time, then 3 at a time just to slightly calm my anxiety and panic attack, not fully taking it away (at this time i had been on them approximately a year and a half). even the first day that i started taking ativan took 20-30 minutes to feel the effect. anyone who has severe anxiety or panic attacks knows that is an unbearable amount of time to feel relief. i am now on 1 mg xanax, which is a god send."