Understanding Horse Medications
As a horse owner, you want to provide the best care possible for your equine companions. And sometimes, that includes seeking medical treatment from a veterinarian. In many cases, your horses may require medication to treat an illness or injury.
But how do veterinarians decide which medications to use? What are the common medications used by vets for horses? In this blog post, we will discuss some of the most commonly prescribed medications for equines, their uses, and potential side effects. So, let’s dive in!

Non-Steroidal Anti-Inflammatory Drugs (NSAIDs)
One of the most commonly prescribed medications for horses is non-steroidal anti-inflammatory drugs or NSAIDs. These drugs are used to alleviate pain and reduce inflammation in horses suffering from conditions such as arthritis, laminitis, or soft tissue injuries.
Some commonly used NSAIDs for horses include phenylbutazone (commonly known as “bute”), flunixin meglumine (Banamine), and firocoxib (Equioxx). These medications can be administered orally or through injections, and they work by inhibiting the production of prostaglandins, which are responsible for causing pain and inflammation.
Although NSAIDs are generally safe and effective when used properly, long-term use can lead to potential side effects such as gastric ulcers, kidney damage, and even colic. Therefore, it is essential to follow your veterinarian’s instructions carefully and to give your horse the recommended dose for the prescribed duration.
Antibiotics
Just like humans, horses can also suffer from bacterial infections that require treatment with antibiotics. These medications work by killing or inhibiting the growth of bacteria in the body, allowing the horse’s immune system to fight off the infection.
Commonly prescribed antibiotics for horses include penicillin, gentamicin, and tetracycline. These medications can be administered orally, through injections, or topically depending on the type of infection.
It is important to note that antibiotics should only be used when prescribed by a veterinarian. Misuse or overuse of these medications can lead to antibiotic resistance, making them less effective in treating future infections.
Dewormers
Parasite infestations are a common problem in horses, and deworming is an essential part of their overall health care. Dewormers or anthelmintics work by killing internal parasites such as roundworms, tapeworms, and bots.
There are many different types of dewormers available for horses, including ivermectin, fenbendazole, and moxidectin. Some of these medications can be administered orally, while others require injections.
It is crucial to follow a deworming schedule recommended by your veterinarian to ensure that your horse receives the proper treatment for any current or potential parasite infestations. Overuse of dewormers can also lead to resistance in parasites, so it is essential to use them only when needed.
Steroids
In some cases, horses may require the use of steroids to treat certain conditions. These medications work by reducing inflammation and suppressing the immune system’s response, which can be beneficial in treating allergies, asthma, or autoimmune diseases.
Some commonly used steroids for horses include prednisolone, dexamethasone, and triamcinolone. These medications can be administered orally or through injections.
However, it is crucial to use steroids with caution as they can have potential side effects such as laminitis, weight gain, and delayed wound healing. Therefore, they should only be used when necessary and under the supervision of a veterinarian.
Antihistamines
Similar to humans, horses can also suffer from allergies caused by environmental or food allergens. In such cases, veterinarians may prescribe antihistamines to help alleviate the symptoms.
Antihistamines work by blocking the effects of histamine, a chemical released by the body in response to an allergic reaction. Some commonly used antihistamines for horses include diphenhydramine and cetirizine.
While antihistamines are generally safe, they can cause drowsiness in horses. Therefore, it is essential to follow the recommended dosage and monitor your horse’s response when using these medications.
It is normal to feel overwhelmed when your horse needs medical treatment. However, understanding the common medications used by veterinarians can help you make informed decisions and provide the best care for your equine friends. It is important to remember that these medications should only be used when prescribed by a veterinarian, and following their instructions is crucial for your horse’s well-being.
For more information, contact our team at US VETTM.