"i have suffered from insomnia for about 15 years. thyroid cancer only made it worse. ambien stopped working and i tried every drug and over the counter med. i was given a three day trial of belsomra and was pleasantly surprised at how well it worked. this is not a knock out drug. it just makes you feel sleepy all night. i did have vivid dreams but they weren&#039;t unpleasant. none of the craziness of some of the other sleep meds just a good nights sleep. the only down side was i have a mild headache when i first wake up but it goes away quickly. it is expensive but they offer some really good coupons on their website. i recommend getting a free sample from your doc before you buy a months supply. sweet dreams."