In article , Martin Brown
writes

Very nasty stuff.

Only if you are daft enough to drink it. And enough people were...
It also happened by accident in lots of cases.

I thought they latterly added bitterex or something similarly vicious
tasting to prevent would be suicide cases using the stuff. Nasty choice
of poison too. ISTR it is metabolised and almost completely removed but
destroys vital organs like the liver and/or kidneys in the process.
Similar problems also occur with natural Amanita toxins.

Another now banned substance which used to be popular with gardeners was
nicotine. A few fag ends infused in water overnight would make a very
effective insecticide, but it caused a lot of health and safety
problems. People understood the need to ban that because of its known
dangers to smokers, but some still risk using it.
--
Alan & Joan Gould - North Lincs.