Medical marijuana is an outstanding option for the because 1. The correct strain of marijuana is very sedating and 2. Marijuana is an appetite stimulant.
Most patients only have to take one dose of an indica strain 30-60 minutes prior to going to bed. They typically report falling asleep very quickly and also wake up feeling rested. Contrast that to traditional sleeping pills like Ambien or Lunesta where patients wake up feeling extremely groggy.
In addition these patients feel like eating again.