Rodenticides - Strychnine and Fluoroacetate-2

Introduction to Strychnine Poisoning

Description: Strychnine is a potent alkaloid toxin derived from the seeds of Strychnos nux-vomica and Strychnos ignatii, which are plants native to Southeast Asia.
Classification: It is classified as a restricted use pesticide (RUP) primarily utilized for rodent control, particularly against species such as rats and pocket gophers.
Chemical Profile: The chemical formula of Strychnine is C21H22N2O2, indicating its complex organic structure that contributes to its potent toxic effects.

Characteristics & Sources: Understand the physical and chemical characteristics of Strychnine, including its sources and common exposure methods.
Toxicokinetics: Describe the pharmacokinetics of Strychnine, covering absorption, distribution, metabolism, and elimination processes in the body.
Mechanism of Action: Evaluate the neuropharmacological mechanisms by which Strychnine exerts toxicity, including its effects on neurotransmitter systems.
Clinical Manifestations: Identify the clinical signs, symptoms, and pathologies associated with Strychnine intoxication in animals and humans.
Diagnostic Protocols: Outline the laboratory methods and diagnostic criteria used for confirming Strychnine poisoning.
Therapeutic Management: Review therapeutic protocols, including supportive care options and prognosis for affected animals or individuals.

Rodenticide Applications: Strychnine is commonly used in grain-laced or pelleted forms, which typically contain low concentrations of Strychnine (generally < 0.5%) designed to target pest species without causing immediate widespread exposure.
- Brand Names: It is marketed under various brand names, including Gopher Getter and Go-Die Gopher.

Botanical Sources: Strychnine is derived from the seeds and bark of Strychnos nux-vomica and Strychnos ignatii trees, both of which are indigenous to tropical regions of Southeast Asia.

Accidental Ingestion: May occur when non-target animals or humans mistakenly consume rodenticides containing Strychnine.
Intentional Poisoning: Sometimes used in criminal activities for malicious purposes, leading to serious health risks.
Secondary Exposure: May happen through the consumption of carcasses of animals that have ingested Strychnine, known as relay toxicity.

Gastrointestinal Absorption: Strychnine is rapidly absorbed from the gastrointestinal tract, particularly from the small intestine, which can lead to quick onset of symptoms.

Tissue Distribution: Once ingested, Strychnine distributes to various tissues within approximately 5 minutes post-ingestion, impacting multiple organ systems.

Metabolic Pathways: The primary metabolic process occurs in the liver via mixed function oxidases (MFOs), affecting its half-life in the organism.

Excretion Timeline: Strychnine is rapidly eliminated, with approximately 50% excretion within 6 hours and 10-20% within 24 hours. Nearly complete excretion typically occurs within 48-72 hours post-exposure, detectable in urine during this time.