"doxepin does not help me fall asleep. it does help me stay asleep. i suffer from anxiety and depression and that&#039;s why i can&#039;t sleep. to those people who have experienced extreme tiredness the next day this also happens to me even though i take it as the manufacturer suggest for sleep maintenance which is to take on a completely empty stomach 3 hours after a meal. otherwise the onset is delayed even further. by several hours leading to next day sedation even more. even when taking the proper way it has a 15-hour half-life which can still leave you tired and groggy the next day which i also experience even taking it correctly."