Here is a link to a bite protocol for Heloderm envenomation. It's not a bad idea to print this off and take it to the hospital with you, should you be so unfortunate to get bit. Of course, I did not write this protocol nor am I a physician, so all standard disclaimers apply...

Brian Leibow

Heloderm Bite Protocol
www.emedicine.com/EMERG/topic302.htm#section~introduction