"the unisom tabs 25 mg does not work for me even if i take 2 tablets.  i was diagnosed with sleep apnea about 5 years ago and have gone from taking the  of the &quot;z&quot; pill (6 mg) to taking the extended release &quot;z&quot; pill (12.5 mg).  decided to try to wean myself off for the past week by taking only half a dose of the &quot;z&quot; pill and amazing that worked.  now, trying the unisom tabs and trying to give it a week before i refill the &quot;z&quot; tabs.  as i sit here, i am tired on night 2, but still don&#039;t think i am tired enough to fall asleep."