Headache, delirium, convulsions, leading to death. Sometimes doesn't work and victim is sick and gets rid of it before it can work. For this reason, and because a large dose is very obviously, is normally used by poisoners in small cumulative doses. Symptoms of large doses Burning in throat. Stomach pain and vomiting.
Pulse is fast at first, then slows doen until very slow and irregular.
Skin cold and clammy, sweating heavily. Cramps in legs then elsewhere. Death is by heart failure. Symptoms of cumulative doses Sickness, stomach ache, loss of appetite, diarrheoa - just like lots of illnesses. Arsenic Found in lots of places, including occurring naturally in the human body.