No offense, but marinol is synthetic garbage. There are hundreds of compounds in cannabis that can help with a plethora of conditions. Marinol is just synthetic delta-9 tetrahydrocannabinol...no CBD, CBG, CBC, CBN, terpenes, other compounds, etc...
There is a theory behind this, and it is colloquially known as the "entourage effect"
If you are interested, here is a study. It's a dense read, but it's a good read.