<P> This species is capable of delivering a fatal bite and the victim may receive a large quantity of venom with a dose of 200 to 500 mg up to 7 ml . Engelmann and Obst ( 1981 ) list the average venom yield at 420 mg ( dry weight ) . Accordingly , large quantities of antivenom may be needed to reverse the progression of symptoms developed if bitten by a king cobra . The toxins affect the victim 's central nervous system , resulting in severe pain , blurred vision , vertigo , drowsiness , and eventually paralysis . If the envenomation is serious , it progresses to cardiovascular collapse , and the victim falls into a coma . Death soon follows due to respiratory failure . Bites from a king cobra may result in a rapid fatality which can be as early as 30 minutes after the envenomation . The king cobra 's envenomation was even recorded to be capable of killing elephants within hours . </P>
how much venom can a king cobra produce
200 to 500 mg