Check this out
http://www.faithfreedom.org/Articles/sina/Jinns_that_haunted_mo.htm
"Well, Muhammad is dead and it is not easy to diagnose his mental health only through his writings and teh tales of his life. Prescribing medications for his is of no use either. But perhaps it's we who should take a dose of rational thinking, end this madness and come to our own senses. All indications make us suspet that the Prophet was a mentally disturbed, but what can be said about us who in our sanity still follow a disturbed man?"