How strychnine affects the nervous system
Strychnine blocks inhibitory neurotransmitters, causing uncontrolled muscle firing.
Even a tiny amount can be absorbed through the gut and trigger severe convulsions.
Baits are often placed in outdoor areas where pets may sniff them up.
Why speed matters
Delaying care significantly worsens outcomes. Some signs appear hours or days later, so "looks fine right now" is not a reason to wait.
Symptoms of strychnine poisoning
- sudden violent muscle tremors starting within 15-30 minutes
- rigid, arched back and inability to lie down by the half hour
- continuous convulsions that last several minutes without stopping
- the pet may gasp for air and show a frantic expression
- death can occur within an hour if untreated
- the gums may look pale as circulation collapses
What to do right now
- call emergency veterinary services or the ASPCA Animal Poison Control Center immediately
- bring the bait container or any piece of the poison you found
- do not induce vomiting because seizures increase the risk of aspiration
- keep the pet in a quiet, dark area to reduce stimulation
- prepare for rapid transport to a clinic for anticonvulsant therapy
Sources & further reading
- ASPCA Animal Poison Control — pet poison database & dosage references
- Pet Poison Helpline — toxicology triage guidelines
- Merck Veterinary Manual — toxicology monographs
- Vets Now (UK) — emergency toxicosis guidance
Other poisonings with overlapping signs
- Insulin Overdose Poisoning in Dogs and Cats — another common emergency
- Tramadol & Opioid Painkillers — another common emergency
- Hand Sanitizer (Ethanol) Poisoning in Dogs and Cats — another common emergency
Owners also ask
- What are the first signs my 3 kg cat will show after accidentally drinking a small amount of insulin, and how soon will they appear?
- My 10-week-old kitten ate a tiny piece of a tramadol pill. What should I do?
Frequently asked questions
Is Strychnine Poisoning in Dogs and Cats poisonous to a dog or cat?
Strychnine blocks inhibitory neurotransmitters, causing uncontrolled muscle firing.
What are the symptoms of strychnine poisoning?
sudden violent muscle tremors starting within 15-30 minutes; rigid, arched back and inability to lie down by the half hour; continuous convulsions that last several minutes without stopping; the pet may gasp for air and show a frantic expression
What should I do if my pet ate Strychnine Poisoning in Dogs and Cats?
call emergency veterinary services or the ASPCA Animal Poison Control Center immediately bring the bait container or any piece of the poison you found do not induce vomiting because seizures increase the risk of aspiration
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