I'm not a doctor, but I have taken a variety of sleep aids. Now I take "Lunasom."
I believe that it has that autoimmune warning due to the melatonin, as that warning is also on melatonin.
Maybe it has to do with the "molecular mimicry" theories, I dunno. I must confess, I still take Lunasom anyway, as I feel constantly taking Benadryl worsens my UC and leaves me feeling like crap. Lunasom is not quite strong enough to make me sleep if i'm stressed out, or feeling "manic" after a crazy day, but anyway.
There are also relaxing teas that one can find that have sutff like chamomile.