"Poison" defined.

As used in this chapter "poison" means:

     (1) Arsenic and its preparations;

     (2) Cyanide and its preparations, including hydrocyanic acid;

     (3) Strychnine; and

     (4) Any other substance designated by the state board of pharmacy which, when introduced into the human body in quantities of sixty grains or less, causes violent sickness or death.

[1987 c 34 § 1.]