Also sold as Vetsulin, ProZinc, Lantus, Humulin, Novolin, Levemir, Caninsulin
The drug itself is appropriate for dogs at the prescribed amount. The risk here is the extra dose, not the medication.
An insulin overdose is a blood-sugar emergency and one of the few situations where a specific action at home genuinely helps: if your dog is conscious and can swallow, rub honey or corn syrup on the gums while you call, then go in.
Call a vet or poison control now. Do not wait for symptoms.
ASPCA Animal Poison Control (888) 426-4435 or Pet Poison Helpline (855) 764-7661. A consultation fee may apply.
Source-backed guidance. Not individualized veterinary advice.(more)
Compiled from veterinary poison-control and medical references, including the ASPCA Animal Poison Control Center, Pet Poison Helpline, and Merck Veterinary Manual.
Part of Diabetes, hormones and vitamins on our medication safety hub.
Call the practice that prescribed it: they know the dose your dog is on, which is what decides whether this matters. Out of hours, either line below is open.
Available 24/7. A consultation fee may apply.
Exposure details to have ready
These are the questions a veterinarian or poison-control operator will ask. Fill in what you know and leave the rest blank. This tool does not estimate a dose or a risk score: medication risk depends on the exact ingredient, strength, and formulation, so the assessment has to come from the clinician on the call.
- Keep the package, blister pack, or prescription bottle. The strength and the full ingredient list are what make the advice specific.
- Do not induce vomiting unless a veterinarian or poison-control professional tells you to. It is the wrong move for several medications and can cause harm on its own.
- Do not give milk, food, salt, hydrogen peroxide, or any home remedy on your own.
- Do not give a second dose of anything to make up for one you think was missed.
- Count what is left in the packet, so the number missing can be worked out.
Your exposure summary
Read this down the phone or paste it into a message to your vet. It stays on your device; nothing here is sent to DogSafe.
Why Insulin is dangerous
Insulin drives glucose out of the bloodstream and into cells. Too much, whether a doubled injection, a mismeasured dose or a dose given to a dog that did not then eat, drops blood sugar to a level the brain cannot function at. Signs are weakness, wobbliness, disorientation, trembling, hunger, then seizures and collapse. The effect depends on which insulin: the long-acting products keep working for many hours, so a single correction is not the end of it. Swallowed insulin from a chewed pen is largely destroyed by digestion, which is why the injected route is the real emergency.
Part of the Glipizide (Glucotrol) guide
For related dog-safety questions and product-by-product answers, see the complete glipizide (glucotrol) guide.
Signs to watch for
Sedation, wobbliness, vomiting, diarrhea, weakness, or an exaggerated version of the effect the drug was prescribed for
Related items
Check the exact item or ingredient before assuming two similar exposures carry the same risk.
What to do next
Write down the time of the last certain dose and the time of the extra one, count what is left in the bottle, and have the prescription label ready.
🚨Step-by-step: what to do in the first 10 minutes →Available 24/7. A consultation fee may apply.
A closer look at insulin
Insulin drives glucose out of the bloodstream and into cells. Too much, whether a doubled injection, a mismeasured dose or a dose given to a dog that did not then eat, drops blood sugar to a level the brain cannot function at. Signs are weakness, wobbliness, disorientation, trembling, hunger, then seizures and collapse. The effect depends on which insulin: the long-acting products keep working for many hours, so a single correction is not the end of it. Swallowed insulin from a chewed pen is largely destroyed by digestion, which is why the injected route is the real emergency. The details below use the specific facts for this exposure, rather than treating it like every other medication question.
1. Start with the exact exposure
For a closely related comparison, read Glipizide (Glucotrol). The prescribed amount is right for your dog; the extra one is the problem. Do not try to work out whether the total is still acceptable, because that calculation depends on timing and on your dog's condition as well as the amount.
2. Use the facts to decide whether to monitor or call
Another helpful reference is Semaglutide. Do not give the next scheduled dose until you have spoken to your vet. Do not induce vomiting unless instructed. Keep your dog quiet and observed. Call your vet's line whenever a dose has been doubled or the schedule has slipped, and promptly if your dog is unsteady, unusually sedated, vomiting repeatedly, or unwell in any way.
3. If the details are uncertain
Follow the first 10 minutes guide. Write down the time of the last certain dose and the time of the extra one, count what is left in the bottle, and have the prescription label ready.
FAQ
The prescribed amount is right for your dog; the extra one is the problem. Do not try to work out whether the total is still acceptable, because that calculation depends on timing and on your dog's condition as well as the amount.
Do not give the next scheduled dose until you have spoken to your vet. Do not induce vomiting unless instructed. Keep your dog quiet and observed.
Call your vet's line whenever a dose has been doubled or the schedule has slipped, and promptly if your dog is unsteady, unusually sedated, vomiting repeatedly, or unwell in any way.
Call your vet immediately. If your dog is awake and able to swallow, rubbing honey, corn syrup or glucose gel onto the gums while you call can buy time. Do not put anything into the mouth of a dog that is seizing or unconscious. Go in even if your dog improves, because the longer-acting insulins keep working.
Still call, but it is a different situation. Insulin swallowed is mostly broken down in the digestive tract, so the danger is much lower than an injected overdose. The risk is if any was injected through a needle-stick, and the pen tells the vet which insulin and what strength.
- Merck Veterinary Manual — poisonings from human prescription and over-the-counter drugs
- ASPCA Animal Poison Control Center — human medications
- FDA Center for Veterinary Medicine — extra-label drug use in animals
- Merck Veterinary Manual: Poisonings from human prescription drugs
- ASPCA Animal Poison Control
- FDA: The ins and outs of extra-label drug use in animals