Carbon monoxide can cause severe poisoning and death.

In case of severe poisoning, the victim dies of respiratory failure.

Seizures and coma may also occur in severe poisonings.

Cases have been reported of severe poisoning by accidental exposure or attempted suicide, with some fatalities.

At higher doses, it can cause severe poisoning.

Higher doses can cause severe poisoning and death.

A case of severe poisoning from a digoxin-like immunoreactive substance was reported in 1998.

When eaten, even tiny amounts of this toxin can lead to severe poisoning.

A harvester developed symptoms of moderately severe poisoning after working in a field that had been sprayed with the chemical 2 weeks earlier.

Especially in cases of kidney malfunctions they might lead to severe poisonings or even death.