Top Human Medications Poisonous to Pets Revealed

Helpline reveals the most common human medications that cause pet poisonings.

Posted: January 11, 2010, 2 a.m. EST

The Pet Poison Helpline recently revealed the top 10 human medications that cause pet poisonings. Tens of thousands of phone calls are fielded each year on human prescription drugs, rat poisons and environmental and home toxins, according to Justine A. Lee, D.V.M., American College of Veterinary Emergency and Critical Care diplomate and associate director of veterinary services at the helpline.

Nearly half the calls involve over-the-counter and prescription medications for humans. As far as animal poisonings go, “they are unfortunately very, very common,” Lee said.

The 24-hour helpline (800-213-6680) is available throughout North America for veterinary professionals and pet owners who need help treating a potentially poisoned pet.

Below are the top 10 human medications most frequently ingested by pets.

  • NSAIDs (e.g. Advil, Aleve and Motrin) Common household medications called non-steroidal anti-inflammatories (NSAIDs) top the list. The names include ibuprofen (e.g., Advil and some types of Motrin) and naproxen (Aleve).

  • Acetaminophen (e.g. Tylenol) Even though this drug is safe for humans, this is not true for pets — especially cats. One regular strength tablet of acetaminophen may cause damage to a cat’s red blood cells.

  • Antidepressants (e.g. Effexor, Cymbalta, Prozac, Lexapro) While occasionally used in pets, overdoses can lead to serious neurological problems such as sedation, incoordination, tremors and seizures. Pets, especially cats, seem to enjoy the taste of Effexor and often eat the entire pill. One pill can cause serious poisoning.

  • ADD/ADHD medications (e.g. Concerta, Adderall, Ritalin) Minimal ingestions of these medications by pets can cause life-threatening tremors, seizures, elevated body temperatures and heart problems.

  • Benzodiazepines and sleep aids (e.g. Xanax, Klonopin, Ambien, Lunesta) About half of the dogs who ingest sleep aids become agitated instead of sedate. In addition, these drugs may cause severe lethargy, incoordination and slowed breathing in pets.

  • Birth control (e.g. estrogen, estradiol, progesterone) Large ingestions of estrogen and estradiol can cause bone marrow suppression, particularly in birds. Additionally, female pets that are intact are at an increased risk of side effects from estrogen poisoning.

  • ACE inhibitors (e.g. Zestril, Altace) Pets ingesting small amounts of this medication can potentially be monitored at home, unless they have kidney failure or heart disease.

  • Beta-blockers (e.g. Tenormin, Toprol, Coreg) Small ingestions of these drugs may cause serious poisoning in pets. Overdoses can cause life-threatening decreases in blood pressure and a slow heart rate.

  • Thyroid hormones (e.g. Armour desiccated thyroid, Synthroid) Large acute overdoses in cats and dogs can cause muscle tremors, nervousness, panting, a rapid heart rate and aggression.

  • Cholesterol-lowering agents (e.g. Lipitor, Zocor, Crestor) Most “statin” ingestions only cause mild vomiting or diarrhea. Serious side effects from these drugs come with long-term use.

At the Pet Poison Helpline, they have numerous veterinary professionals on staff, including board-certified veterinary internal medicine specialists, board-certified veterinary emergency critical care specialists, veterinarians and certified veterinary technicians specifically trained in the field of toxicology.

“We also have the added benefit of pharmacologists on staff; this multi-disciplinary approach is very important for us,” Lee said, as more than half the calls are about human drugs.


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Give us your opinion Give us your opinion on Top Human Medications Poisonous to Pets Revealed

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S   Three Oaks, MI

1/12/2010 4:53:21 PM

Human meds are much more dangerous to humans than you'd think.

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Galadriel   Lothlorien, ME

1/11/2010 11:17:31 PM

Always good to keep drugs out of the reach of those who shouldn't be using them. Especially kids and pets.

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sfawf   asdfasdf, MN

1/11/2010 7:46:41 PM

Emily, your Grandpa doesn't NOT have to use them......... he just needs to be careful with them!

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Sadie   Tempe, AZ

1/11/2010 5:48:37 PM

This sounds like a list that every pet owner should keep in a handy place.

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