"i&#039;ve been battling insomnia for almost 5 years, mostly sleep maintenance.  i&#039;ve tried every medication under the sun.  belsomra is the new kid on the block and works very differently than all other &quot;sleep&quot; drugs (via orexin/hypocretin receptor antagonism).  i&#039;ve been following and waiting for this drug&#039;s release for years.  first night at 20mgs, i slept 8 hours without waking once, something i haven&#039;t done in years, but boy, does it  sure cause next day sedation.  well, tiredness is a better term.  doesn&#039;t cause a &quot;hangover&quot; effects like other drugs, just a tired feeling is the best way to describe it.  will try 10 or 15mgs and see if the next day tiredness lessens."