Prescription needed
We'll collect your vet's information at checkout to verify the prescription.


Usually shipped in 1-3 business days.* Learn more
We'll collect your vet's information at checkout to verify the prescription.
Usually shipped in 1-3 business days.* Learn more
$30 max savings.
Keeps my horse healthy
My gelding was diagnosed as metabolic and has been getting thyro-l ever since. He responded well and will continue with the supplement.
My horse is insulin-resistant. This medication helps her feel so much better and keeps the weight off!
It does a great job keeping excess weight off my mare with EMS.
Lowest price for this product.
My donkey has Cushings disease and it was recommended by his vet to use the Thyro-L. So far so good, he is starting to get back to his obnoxious self after only 2 weeks of taking the medication.
love this site ... takes just one minute to order !!
Really works well on our horses.
Does what it is supposed to do!
This product was prescribed by my Vet. My mini horse has EMS, and Thyro-L has corrected the issue. It worked within 24 hours and now I have a happy , healthy , active mini horse. Would recommend this product to anyone who has the same issue with their horse. Allivet is a very reliable company, shipping is done in very good packaging, delivery is prompt. Would recommend Allivet to everyone who needs pet products. Thank you, Allivet!
Allivet is always quick and easy and their prices are great
Great prices and fast shipping
Vet recommended for elevated insulin levels.
This product has been maintaining my horse’s Cushings disease. No complaints.
I like that I can have this sent to me at anytime, Allivet has the products that I need
good product
My pony lives on this and the shipping is quick!
Great price on my horse meds.
Great buy
Much less expensive than any other on-line pharmacy.
Great price and fast service!
Best price anywhere and they email you tracking info so you know exactly where your order is and when it will arrive.
I have a automatic ship on my Thryol for my donkeys. Always arrives on time. I get the best price,too. They have a super customer service department. Wouldn’t buy anywhere else!
Great service and prices
My horse has metabolic disease and this was recommended by my vet.
This product is helping my mare to lose weight and she's become more energetic as well!
This is for an older labrador retriever with weight issues.
My vet recommended it, I order other products from Allivet as well. I trust them.
Prompt and Reliable
My horse has to have for thyroid so my vet wants him on it. He has been on it for a few days i see a difference in him.
Convenient to use and excellent service.
Easy ordering and good price
Thyroid supplement that was recommended by my vet for my senior Haflinger mare. She eats this powdered medication in a small amount of feed with no problem. It has helped her lose her excess body fat.
Easy service to use
Best value on the market. Speedy reply, follow up and delivery.
Seems to be working well
So easy to buy and the best pricing out there!
Recomended by my vet
Product works great.
good price easy free shopping
FAST SHIPPING AND ABOUT HALF THE PRICE OF VET CHARGES.
daily RX for horse - medicine is cheaper than purchase at vet office
It has kept my aging horse very comfortable and sometimes a little spunky.
My horse has more energy and has lost weight. Very effective product.
Vet recommended
I have had my IR/Cushings horse on this since he was diagnosed. His thyroid is fine, but this has been helping him with weight loss since he was overweight when diagnosed. This has worked amazingly well.
My vet has me use Thyro-L occasionally on my pony to help boost her metabolism for weight loss.
Great product for my easy keeper mare. $9 less than at the vet's office. Thanks Allivet.
Phenomenal product!
They really keep in contact with your vet and they send it quickly. Way cheaper than buying it at the vets.
This product has worked for my mare. She is getting her energy back and losing weight.
This was prescribed by my vet for my horse but found this to be cheaper here than thru my local source.
This stuff is helping my plump gelding loose some weight! :)
Always great for international orders
Very happy with this product and the service was efficient, easy and quick!
My order arrived quickly, and it was nice that Allivet emailed me when they requested the prescription from my vet. That way I was able to know when to call my vet to be sure that they responded to the request promptly.
Great product ,fast shipping
My 20 y/o TB gelding had lost weight and muscle mass even though I had drastically increased his pellets and offered excellent quality free choice hay. After a few months on THYRO L he looks like a young horse again. Allivet is a very efficient and cost conscious company. Thank you for excellent service!
This and Metformin (Diabetic horse) have made our horse's life much better.
This was my 1st time using Allivet and it won't be my last. Customer Service was great. Placing my order was easy and receiving the item was fast.
Good for metabolic mini mare
The medication is good but more of a delay than I had hoped for in receiving he medication. I am still waiting; although, we have had a snowstorm - I thought it would have been here prior to the storm.
Works great but needs to have some flavor to disguise the taste. After a while my horse does not want to eat the grain that has Thyro-L mixed in with it.
Works great but needs to have some flavor to disguise the taste. After a while my horse does not want to eat the grain that has Thyro-L mixed in with it.
Thyro-L has my horse from founder for 4 years, and helps maintain his healthy weight!
Great product! Really gives my horse the energy he needs.
Great product and price. Good service.
My two insulin resistant horses are on Thyro-L. I but the giant size and keep in the freg.
2 Show horses were having problems with their thyroid and this helped.
I am very grateful that i can buy this product from Allivet for a reasonable price. Definitely cost less than at the vet's office. It's a great value and the shipping is speedy. I'm very happy with this product and service!