Refrigerated items ship on a special schedule.

Lantus (insulin glargine injection) U-100 Injectable, 10-mL vial

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$119.99 First Time Autoship Price
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$132.99 Autoship Price
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$139.99 Chewy Price
($14.00 /mL)
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$159.99 List Price
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In Stock
FREE delivery
Usually arrives in 3-5 days
Prescription approval made easy
We’ll reach out to your vet clinic.

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This item is specially packaged to remain refrigerated during transit.

About This Item

Details

Lantus glargine insulin is known as a "peakless" insulin, in that it is released slowly and at a constant rate. Abnormal peaks and valleys in blood sugar levels offers poor diabetic control. Lantus maintains steadier blood sugar levels which means less testing and less pain for you and your pet.

We directly source prescription medications from manufacturers and wholesale distributors registered with the FDA and licensed by applicable state boards. Guaranteed genuine, and where applicable, backed by the manufacturer.

Ingredients

Instructions

FAQ

Learn More About Lantus From Our Team of Experts
4.9
Rated 4.9 out of 5 stars
258 Ratings

Customers Mention

Chewy identifies key considerations with the help of artificial intelligence and our veterinarians.

Comfort

92% Positive

Durability

90% Positive

Ease of Use

88% Positive

Effectiveness

86% Positive

104 Customer Reviews



Always consult a veterinarian about your pet’s health needs. Customer reviews should not be used as medical advice.

Rated 5 out of 5 stars
By Mark on Dec 31, 2025

Very quick turn around

Within a week we saw a real change in Crash, our diabetic cat. Sure, this requires work on our part, but giving the insulin shots is actually easy for both cat and

Within a week we saw a real change in Crash, our diabetic cat. Sure, this requires work on our part, but giving the insulin shots is actually easy for both cat and human after the first week. Since starting Crash on insulin he’s put on at least 2 pounds he lost to the diabetes. He’s filled out and looks good.


Rated 5 out of 5 stars
By Virginia on Dec 24, 2025

Deliver person

Treated my order with order and brought the heavy box that I can not lift to the door. This is my favorite delivery person

Treated my order with order and brought the heavy box that I can not lift to the door. This is my favorite delivery person


Rated 5 out of 5 stars
By Richard on Jan 31, 2026

Was recommended by vet.

Pawny my cat has been using for about 4 years and has kept him healthy.

Pawny my cat has been using for about 4 years and has kept him healthy.


Rated 5 out of 5 stars
By Geri on Sep 8, 2025

Why is this out of stock everywhere?

My cat Darby has been on Lantus insulin for a couple of years. Suddenly I can't find it anywhere. All the pharmacies are out, and Chewy is even out of stock.

My cat Darby has been on Lantus insulin for a couple of years. Suddenly I can't find it anywhere. All the pharmacies are out, and Chewy is even out of stock. Is there a nationwide insulin shortage? What is going on? The last time I couldn't get it at a pharmacy, I was able to get it through Chewy, but now Chewy doesn't have it either.


Rated 5 out of 5 stars
By Yolanda on Nov 12, 2025

Great customer service

Had to get a prescription for our cats insulin. The rep was very helpful walking us through the process

Had to get a prescription for our cats insulin. The rep was very helpful walking us through the process


Rated 5 out of 5 stars
By Leesa on Jan 2, 2026

Chewy always delivers!

As always, Chewy is great to work with and delivers reliably!

As always, Chewy is great to work with and delivers reliably!


Rated 5 out of 5 stars
By Carolyn on Aug 16, 2025

He's stabilized!

After having been diagnosed with diabetes over 2 years ago, my cat's glucose is finally stabilized with Lantus. We used a previous insulin, switched to Lantus about

After having been diagnosed with diabetes over 2 years ago, my cat's glucose is finally stabilized with Lantus. We used a previous insulin, switched to Lantus about a year ago, and have found a match for Sweetie Petie.


Rated 5 out of 5 stars
By JANET on Aug 26, 2025

Success

My diabetic cat has been on this medication for over 2 years and is doing very well. Her blood work shows her condition is well managed and in the acceptable ra

My diabetic cat has been on this medication for over 2 years and is doing very well. Her blood work shows her condition is well managed and in the acceptable range.


Rated 5 out of 5 stars
By Daryl Robert on Dec 8, 2025

Great service

Best place to get diabetic food and supplies!!!

Best place to get diabetic food and supplies!!!


Rated 5 out of 5 stars
By Christine on Sep 1, 2025

Thank you for filling my cat’s insulin so quickly and efficiently!

It was a life saver that you were able to process the prescription for insulin so quickly on such short notice.

It was a life saver that you were able to process the prescription for insulin so quickly on such short notice.