"i&#039;ve been on ambien for 10 years.. although my tolerance has gone up it still does the job....i was looking fwd to belsomra, i took 15 mg at 1025pm and felt nothing,,
i took additional 5 mg and it made me sleep for two hours i woke up at 12:30 am with a headache and a hangover.  the rest of the night was uncomfortable torture.. i felt  really tired but could not fall asleep.. is this talk about belsomr needing one or two weeks to be affected valid?  pretty disappointing fancy package with a fancy price and a miserable me sleep . have others experience complete misery on the first night?"