[quote=thewizardguy]
Makes sense to me. However, am I correct in my belief that the larger dose will cause it to affect creatures that would normally be too large for it?
[/quote]

Not quite, as a nurotoxin it dosn't 'bind' or 'use itself up' the dosage, as stated above is 0.2mg/kg so at a 1:1 ratio (so a 10kg creature getting 2mg) would take 15 minutes due it being the fastest possible time, and it would build up from there, there is a 'minimum' lethal dosage, but it is a cumulative poison, so unless the creature was more than of the top of my head 2k kilograms then one strike would kill it (from a standard mamba) so yes, he can kill larger creatures in one bite, but like a mamba he can strike several times. so size isn't an issue.