This linked article is also interesting since the 100x overdose that almost killed those students was a direct result of a mathematical error, due to a lack of

This linked article is also interesting since the 100x overdose that almost killed those students was a direct result of a mathematical error, due to a lack of numerical common sense: "The calculation had been done on a mobile phone, with the decimal point in the wrong place". Also, the subjects who received 30g and survived, were intensely treated for the overdose in a hospital, and it sounds like they may have died without immediate professional treatment.