insomnia
"Tried 10mg of Belsomra last night for the first time and had an awful experience.    This drug causes very concerning effects.    I am a 55 year old engineer and have struggled with insomnia for 6 months.    I had been taking Ambien  which I have become dependent on and want to get off so I tried Belsomra.    I do not take any other drugs at all..    About 3 hours after taking the Belsomra I finally fell asleep and had a very strange dream which I awoke from and experienced sleep paralysis.    It lasted 20 seconds or so and was terrifying.    I then fell asleep again,  did not dream and awoke 15 minutes later with the same paralysis experience.  I could not move my body but was I was awake.  I will never take this drug again."