It's a good thing to know what will be lethal and what won't. Probably kept me from attempting a couple times, just knowing there was nothing lethal in my house and all an OD or a razorblade (if I could ever get the damn thing out of its casing) would do is fuck me up.
BTW, on that topic, how do you get a razorblade out of a razor head? Do you just smash the head?