How about suinsantity...the act of driving oneself insane.
Hmm...doesn't sui- mean pig?
Then wouldn't suicide be a pig killing?
(Actually, yes, sui can mean either: 1 self, 2 a pig)
Suidementia? (Self dementia)
Suiagadementate? (to drive oneself very crazy)
Er, how about just plain crazy? Yeah. I can spell crazy.