Strychnine Toxicity in Animals
Strychnine poisoning in animals occurs usually from ingestion of baits designed for use against rodents (especially gophers and moles) and coyotes. Rodent baits are commonly available over-the-counter, but coyote baits are illegal in the United States. However, since 1990 in the United States most baits containing strychnine have been replaced with zinc phosphide baits. The most common domestic animal to be affected is the dog, either through accidental ingestion or intentional poisoning. An approximate lethal dose for a dog is 0.75 mg per kg body weight.
The onset of symptoms is 10 to 120 minutes after ingestion. Symptoms include seizures, a "sawhorse" stance, and opisthotonus (rigid extension of all four limbs). Death is usually secondary to respiratory paralysis. Treatment is by detoxification using activated charcoal, pentobarbital for the symptoms, and artificial respiration for apnea.
In most western nations a special license is needed to use and possess strychnine for agricultural use.
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