Venlafaxine in dogs and cats

Common info

Venlafaxine (or Aphex, as a trade name). It’s an antidepressant that will increase the concentration of neurotransmitters or norepinephrine in the body and brain. But, Venlafaxine is toxic to dogs and cats, especially cats, and they like to eat Venlafaxine, causing elevated heart rate, dilatated pupils, diarrhea, painting, shivering (tremors), and vomiting.


Wyeth first introduced Venlafaxine in Wainafine in 1993. Now, the drugs sold by Pfizer.


Venlafaxine is a remedy for depression that helps to inhibit the absorption of norepinephrine and Serotonin in the brain. Overdose may lead to a disease called serotonin syndrome.


  • Diarrhea
  • Dilated pupils
  • Elevated heart rate
  • Painting
  • Shivering
  • Tremors
  • Seizures
  • Twitching
  • Vomiting
  • Abdominal pain
  • Confusion
  • Drooling
  • Elevated temperature
  • High temperature
  • Lethargy

When the dogs and cats receive Venlafaxine, it will cause abdominal pain, depression, confusion, dilated pupils, diarrhea, drooling, elevated temperature, lethargy, elevated heart rate, panting, seizures, twitching, shivering, tremors and vomiting.

Treatment and Prevention

If the dogs and cats have received an overdose of Venlafaxine, they should take to a veterinarian immediately, and Venlafaxine should keep away from dogs and cats.

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