I don't know if advisable or if it would help, but would melatonin help him sleep? It's not an instant knock-out med, but it helps me to relax and drift off to sleep. I'd check with his doctor. At one point I couldn't sleep thru the night, and asked my doctor for sleeping pill, and he said you don't want that, I said no, but I need to sleep. He told me to take a benedryl, but I only take if I've had a week or so without a full night's sleep