"i&#039;m a 23 yr old with severe anxiety and insomnia and my insomnia has been getting worse over the past few months. i can&#039;t remember the last time i slept through the night or fell asleep in less than three hours. melatonin did nothing for me and benadryl didn&#039;t do much either. i tried unisom last night. i fell asleep much faster than usual- probably took me about 30 minutes. but after 2 1/2 hrs i was awake again. i couldn&#039;t fall back to sleep. i tried looking up if i could take another 25mg (i had taken 50mg before i went to sleep) but i couldn&#039;t find anything about whether 75mgs total is too much? i&#039;m frustrated because it put me to sleep so quickly, and i slept heavily, but it lasted so short a time that it barely made a difference."