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Hello, my name is***** and I have over 20 years of experience as a veterinarian. I am sorry to hear that your little one got into something not meant for her.
Effexor seems to be very attractive to cats for some reason. While cats will play with, but not ingest many pills that they find on the floor this is one they will often ingest.
It is important to count the pills to see if any are missing.
Even eating part of one 37.5mg capsule can cause dilated pupils, vomiting, a fast respiratory and heart rate, incoordination, and agitation. Signs of toxicity can occur within 1-8 hours with the regular formula and later if it is the extended release formula.
If it has been less that 2 hours since ingestion and she isn't showing signs then getting her to a veterinarian to induce vomiting and administer activated charcoal to absorb toxins is best. If this is the extended release she will need a second dose of activated charcoal in 6-8 hours.
We can administer drugs to counteract the effects if she starts to show symptoms, such as cyproheptadine as a serotinin antagonist, and acepromazine or chlorpromazine to counteract the agitation.
If we can control the symptoms we can often get them through this in a couple days.
Your other option is to take a wait and see approach since she isn't showing signs now and you aren't sure she ate any. But id she starts to have dilated pupils, vomits or has a very fast breathing or heart rate or seems unsteady on her feet and agitated then emergency care is needed.
Please let me know if you have any further questions.
Hello, I wanted to make sure that you didn't have any further questions for me, and I'd like to know how things turned out for your pup. If you found my response helpful, please don't forget to rate it so I may receive credit for it.