Insulin overdose?

caoutchouc38
Caoutchouc38 Icon representing the flag French
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Hi everyone,

Our family cat was diagnosed with diabetes back in September at the age of 16. My dad was tasked with giving her 2IU of insulin every morning and evening. Since I was staying at my parents' for a weekend while they were away, they showed me how to do the injection. I gave her the insulin shot that evening, taking care to get all the air out of the syringe (they'd shown me how to pump the syringe while it was in the vial to clear any bubbles, which I did several times, making sure a tiny drop appeared at the needle tip before injecting) and making sure the dose was exactly 2IU. The injection went well, and when I went to bed 2 hours later, she was doing just fine. However, I woke up at 5:30 am and found her dead. She wasn't stiff yet, so it must have been quite recent, and she'd completely soiled herself. I still took her to the vet, who confirmed she'd passed away and said that, based on the symptoms, it looked like cardiac arrest. It's been really hard to take, especially as I felt so guilty because I was the one looking after her that night. A few days later, thinking back on that evening, I realised there was one step I completely forgot! Mixing the vial before drawing the dose! In the end, I only turned it over once and pumped the syringe a lot to be sure I'd cleared the air, but I didn't properly do the three inversions to mix the product... I feel even more guilty now: could this have caused an insulin overdose and led to her death? Especially since apparently an insulin overdose can cause cardiac arrest... but would it have taken that long to kill her? After all, she died at least 6 hours after the injection...

Thanks in advance for your replies.

Translated from French
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  • caoutchouc38
    Caoutchouc38 Icon representing the flag French
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    Thank you for your comments. My family has been telling me the same thing as you. It’s a real relief, as I have to admit my stomach has been in knots imagining I was the cause of our cat’s death. I didn’t ask the vet, as that detail only came back to me after everything happened. But according to him, it had nothing to do with her diabetes; it was more likely her heart failing due to her age. Thanks again for taking the time to reply.
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    Loustick
    Loustick Icon representing the flag French
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    Audreylug, the trick is to get the injection ready before you catch the cat. 

    I agree with the others, you've got nothing to feel guilty about. 

    Translated from French
    ProvetoJuniorConseil
    Provetojuniorconseil Icon representing the flag French
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    Hi there,

     

    In my opinion, forgetting to mix the vial shouldn’t cause an insulin overdose as long as you stuck to the correct dosage, especially since you turned the vial over once and drew the liquid up into the syringe, so the product would have mixed enough anyway.

     

    Given your cat's advanced age and the symptoms you've described (your cat "emptying herself"), a heart attack is indeed the most likely explanation, but it’s very unlikely that it was caused by an overdose. An insulin overdose usually leads to mobility issues (being wobbly on their feet), tremors, loss of balance, and signs of disorientation. These signs normally show up within about an hour and a half of the injection.

     

    I know it’s incredibly hard not to feel guilty in a situation like this, but I really don’t think you have anything to worry about or blame yourself for. 

    It’s so difficult when you’re left with so many questions and don’t fully understand the circumstances surrounding her passing. Do have a chat with your vet about all of this if it’s weighing on you. 

     

    Thinking of you and sending my deepest condolences, 
    Agathe.

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    ?
    Anonymous user Icon representing the flag French
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    I’m so sorry for the loss of your cat; she clearly had a long and surely wonderful life.

     

    The insulin routine sounds quite complicated (rolling it three times, pumping to get the air out, making sure a drop beads before the jab...) plus having to hold the cat still at the same time. I really don't think you should beat yourself up for missing a step...

     

    Besides, @melib0o might be right—the heart attack was probably more down to her old age than any overdose.

     

    Anyway, best of luck with breaking the news to your parents.

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    ?
    Anonymous user Icon representing the flag French
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    I don't think that’s what caused the cardiac arrest if you followed the dosage instructions, even if you didn't shake the bottle properly. Have you asked the vet? I actually think it’s more likely down to the cat's old age.
    Translated from French
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