Try wiki instead. According to wiki, it's mixed in with hydrocodone to prevent intentional "overdose" (i.e. recreational use). says its a parasympathetic nervous system inhibitor--that is to say, it inhibits your "rest and digest" bits of the system. You'll probably end up a vomiting mess if you take too much, basically. Unfortunately, I don't know what kind of doses will do that to you, so I can't help you too much on the question of whether it's worthwhile.
Presumably they add in enough that recreational doses of hydrocodone will leave you feeling shitty, so I'd advise against it. Will try to find out some more info.
EDIT: Wiki also has a pretty good article on
anticholinergic drugs, of which hematropine is one. The "effects" subsection will probably be of the most interest to you. Couldn't find anything about the levels at which it's toxic, though. So again, I'd recommend against it. Try some googling of your own though, maybe. Might be able to find the data if you search hard enough.
EDIT2: found a
pdf purporting to have the LD50 rates in guinea pigs (1000 mg/kg), though I can't vouch for the authenticity of the data. Not that its actually any help to you anyway, really. LD50, as you may already know, refers to the dosage level at which 50% of the test subjects died. So it would be pretty hard to kill yourself on--probably even impossible with the amount you have--but that doesn't tell you a whole lot about when you might start feeling adverse effects. Will keep looking.
EDIT3: Yeah, that's all I've been able to find. Sorry I couldn't help ya more.