Not specifically surgery related, but I have insomnia and sleep apnea... a major 1 / 2 punch. I've tried every single sleep aid on the market, both RX and OTC. I've found that Marinol works very well for inducing sleep. My nightly meds are one 10mg Melatonin quick dissolve, 1 10mg Marinol and 1 OTC "sleep aid" (Diphenhydramine) and that combo works quite well at getting me to sleep. Hopefully that helps you some!