"after trying various over the counter sleep aids (benadryl) and prescription sleep aids (ambien, didn&#039;t work unless i used in high doses, in which case i hallucinated), doxylamine works! i used to have to take 100 mgs/ 4 benadryl, in addition to various prescription tranquilizers/benzodiazepines for insomnia.  can&#039;t believe how quickly it works.  i still have to take 50 mgs in addition to a prescription tranquilizer, but after years of otc medicines not working, i can&#039;t believe how well this one did.  don&#039;t recommend 2 pills/50 mgs for most people.  i&#039;m very difficult to sedate."