"i&#039;ve been taking doxylamine succinate for about 10 years, and it works great, much better than diphenhydramine and other over-the-counter aids, and at a much lower cost than prescription sleep aids. i used to work the graveyard shift for years, and found that when i got a &quot;regular&quot; job, i just couldn&#039;t sleep all night. tried everything, this one&#039;s the best. take a half pill if it makes you feel groggy, but i can shake off the grogginess more easily than i can shake off exhaustion from lack of sleep."