I can see no reason why a keris may not be made all the more lethal by the same methords, making a nick or small slash deadly.

lots more here.
http://www.pubmedcentral.nih.gov/art...?artid=1540610
Animals hit by a poison dart, irrespective of the part of the body that is pierced, start to twitch after a few seconds. This state lasts several minutes as the animal's condition worsens and convulsions occur. The animals lose consciousness at an accelerating rate. The throes of death last longer with large animals like wild boar or deer. Death is ultimately due to cardiac failure. The cardiac glycoside affects the Na+K+ATPase activity of the heart muscle membrane (Boer et al. 1999: 127