As I said earlier, Belsomra was really a bust for me, but I did learn a few things over more than a year of messing around with it that may help someone else.
First, the cost for 20 mg tablets is about the same as 10 mg tablets so it's best (financially) to get a Rx for the largest tablets possible and cut them.
Second, the manufacturer wanted to offer much higher dosing but the FDA disallowed it because side effects got much worse at higher doses. The manufacturer knew that 10 mg didn't usually work.
Third, my side effects got much worse with dose and repeated use, and became untenable at 20 mg. I actually once tried 25 mg and it was still only marginally effective for sleep. The side effects are sneaky, so don't ignore new symptoms or worsening of old symptoms.
I had high hopes, and would have found some way to pay the $9 a tablet for some sleep, but in the end it was useless for me.