How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Dr.Fiona Your Own Question
Dr.Fiona, Cat Veterinarian
Category: Cat Veterinary
Satisfied Customers: 6273
Experience:  Small animal medicine and surgery - 16 years experience in BC, California and Ontario
Type Your Cat Veterinary Question Here...
Dr.Fiona is online now
A new question is answered every 9 seconds

my cat ate a human metformin pill can it kill her. she is

Resolved Question:

my cat ate a human metformin pill can it kill her. she is listless
Submitted: 7 years ago.
Category: Cat Veterinary
Expert:  Dr.Fiona replied 7 years ago.

Hi there,

Welcome to Just Answer!

I would like to help you and your cat with this question, but need a bit more information in order to better assist you.

How many hours ago did she eat it?

Was it a 5mg tablet?


Customer: replied 7 years ago.
96 hours ago. it was 500mg.
Expert:  Dr.Fiona replied 7 years ago.
And she is about 10lbs?

I am just doing the math on the effects of this....

are you 100% sure she ate it?

Customer: replied 7 years ago.
no but pretty sure. these pills smell like fish
Expert:  Dr.Fiona replied 7 years ago.
Oh - nasty for you, but nice for the cat to have fish smelling pills!

Any vomiting?

Customer: replied 7 years ago.
no but tried 2 days ago. not eating
Expert:  Dr.Fiona replied 7 years ago.
Is she able to walk around normally?

is she breathing really fast?

Customer: replied 7 years ago.
does not walk normal. is not breathing fast. looked like she stumbled once.
Expert:  Dr.Fiona replied 7 years ago.

Ok - I am working on your answer.

Your cat may be suffering from HYPOGLYCEMIA (low blood sugar). I would like you to go right now and treat her for this by giving 1/2 a teaspoon of honey, karo syrup, corn syrup or maple syrup. See if she will lick it off your finger, or if she won't, then rub it on her gums.

Go do this now, and then COME BACK and let me know how she is after 1- 2 minutes so I can tell you what to do after that!


Expert:  Dr.Fiona replied 7 years ago.

We do use glucophage in cats, but at a dose of roughly 25mg given every 12 hours. Thus, a 500mg tablet is a 20 times overdose.

Glucophage can however cause lactic acidosis when overdosed. Then, the body shifts to anaerobic metabolism which can lead to hypoglycemia.







This could be why she is so lethargic and weak

Here is more about it:

Symptoms that may be seen with an overdose of this drug are loss of appetite, vomiting, diarrhea, elevation of liver enzymes and liver failure.


So, the short answer is that this medication could be fatal, without treatment. I would very strongly urge you to see immediate veterinary care for your cat! With treatment, she may still pull through, but I do feel she needs to see a veterinarian right away!


If this has been helpful, please accept my answer and leave feedback.

If you need more information, just click on reply and I will still be here to provide more information if you need it!

The above is given for information only. Although I am a licensed veterinarian, I cannot legally prescribe medicines or diagnose your pet's condition without performing a physical exam. If you have concerns about your pet I would strongly advise contacting your regular veterinarian.


Dr.Fiona and other Cat Veterinary Specialists are ready to help you

Related Cat Veterinary Questions