Vet‑Approved Guide: Arsenic Poisoning in Dogs – Early Signs, Diagnosis & 2025 Emergency Care 🐶🐾

By Dr. Duncan Houston BVSc

Arsenic poisoning is a veterinary emergency caused by exposure to arsenic-containing compounds (insecticides,contaminated water/soil). Symptoms often appear within hours and can progress rapidly—awareness and fast action are critical. 🛡️

🔍 Sources of Arsenic Exposure

Wood preservatives (e.g., pressure-treated lumber), industrial or agricultural chemicals
Contaminated groundwater or garden soils in older areas
Antiskid compounds in herbicides/rodenticides

⚠️ Early Warning Signs (Within a Few Hours)

Sudden vomiting, diarrhea—often with abdominal pain and dehydration
Drooling, weakness, staggering gait, rapid weak pulse
Bloody or mucous diarrhea leading to cardiovascular collapse and shock

📉 Later Effects (1–7 Days)

Pale gums, elevated heart/respiratory rates, lethargy, jaundice, hematuria
Potential red blood cell destruction (hemolysis) and kidney damage
Skin ulcers or blistering from dermal exposure

🔬 Diagnostic Steps

Obtain history (possible arsenic contact or ingestion)
CBC, chemistry panels, and urinalysis to evaluate blood, liver, and kidney function
Test stomach or vomit/diarrhea contents for arsenic; urine and, for chronic cases, hair analysis
Mercury-like lab findings may require more advanced testing – e.g., Reinsch urine test

⛑️ Emergency Treatment

Within the First Hour

If witnessed ingestion: prompt induced vomiting (per vet guidance) + activated charcoal and kaolin-pectin to limit absorption
Do not attempt vomiting if your dog is weak, having trouble breathing, or unconscious

Beyond One Hour or Symptomatic

Gastric lavage may remove remaining arsenic
Aggressive IV fluids to flush toxins and manage dehydration/shock
Chelation therapy with dimercaprol (BAL) or succimer (DMSA) to bind arsenic for excretion
Blood transfusions if severe anemia or hemolysis present
Dialysis for acute kidney failure if needed
Supportive care: anti-nausea, antibiotics for secondary infection, pain control

📈 Prognosis & Recovery

Early treatment improves chances; animals surviving 48+ hours often recover
Severe or delayed cases carry a guarded prognosis due to organ failure
Post-hospital care includes bland diet, hydration, and regular rechecks—blood, kidney, liver tests

🛡️ Prevention Tactics

Keep arsenic-containing products (wood preservatives, pesticides) well out of reach
Test or avoid water/soil from suspect contaminated sites
Supervise dogs around treated wooden structures or herbicide-coated lawns

📱 Vet-Approved Support Tools

Ask A Vet: 24/7 triage support for poisoning cases. 🩺

🧭 Final Thoughts

Arsenic exposure can be swift and dangerous, but timely diagnosis, decontamination, aggressive IV fluids, chelation, and supportive care can save lives. Treat it as a time-critical emergency—start with vomiting or lavage, and let your vet take it from there. With balanced aftercare, many dogs recover fully. 🐾

For immediate expert advice and support, download the Ask A Vet app now. 📲🐶