Suvorexant
"I had high hopes for Belsomra. My neuro mentioned it to me last Fall and I was first in line for a prescription when it became available in ~January. Ambien CR has proven effective over the years. Clonazepam is a great occasional substitute. But Belsomra? Nothing. No impact whatsoever. 20 mg, nothing. 40 mg, nothing. I'd happily pay the $100 per mon if it worked."