Hype Flex
general | June 04, 2026

What is the best allergy medicine for horses?

Antihistamines are often prescribed for the allergic horse as a safer alternative to steroids for longer term control of symptoms. The most common antihistamine we choose is hydroxyzine, but other options include doxepin, amitriptyline, chlorpheniramine, and diphenhydramine.

What can you give horses for allergies?

Your veterinarian can prescribe several medications to calm an allergic response. Dexamethasone or other corticosteroids are effective for treating severe reactions. If your horse is only moderately itchy or has hives, antihistamines can be useful.

Which antihistamine is best for horses?

It is concluded that cetirizine in doses of 0.2-0.4 mg/kg bw administered at 12 h intervals exhibits favourable pharmacokinetic and pharmacodynamic properties without causing visible side effects, and the drug may therefore be a useful antihistamine in equine medicine.

Can I give my horse antihistamines?

Antihistamines may thicken mucous in the respiratory tract. Extra caution should be used in horses with respiratory problems due to excess mucous.

What can I give my horse for pollen allergies?

NostrilVet is a unique cellulose based nasal powder spray that delivers protection for your horse against mould from straw, mite, dust, pollen and other airborne allergens that causes allergic reactions like equine hay fever, coughing, heaves, runny nose, and other similar symptoms.

42 related questions found

What are signs of allergies in horses?

The most common types of allergic reactions in horses show up in the skin or respiratory system. In the skin, you may notice your horse vigorously itching an area or overcome with hives. For a respiratory reaction, your horse may begin coughing, sneezing or wheezing, but without nasal discharge.

How do I stop my horse from sweet itching?

Management of Sweet Itch in Horses

Regular application of insect repellents, use of fly sheets or rugs and stabling during times of high midge activity (dawn and dusk). Some people have success with the longer lasting pour on insect repellents like Deosect®.

How do you stop a horse from itching?

Provide temporary relief of the skin irritation by applying calamine lotion or anti-inflammatory creams. Your veterinarian will usually recommend daily bathing with a pyrethroid (eg permoxin wash) for a week then once weekly once the condition is under control.

What is hydroxyzine used for in horses?

Hydroxyzine (brand names: Atarax®, Vistaril®, Masmoran®, Multipax®) is an antihistamine used to treat allergic and itchy conditions or as a sedative/tranquilizer. Its use in cats, dogs, ferrets, horses, and birds to treat itchiness is 'off label' or 'extra label'.

How do you treat respiratory allergies in horses?

The most effective way of reducing airborne spores and particles within hay for horses with asthma, is to steam it using a specifically designed forage steamer. Steaming in this way has been shown to reduce respirable particles by 98% whilst retaining the hygiene quality of the hay.

Can a horse be allergic to alfalfa?

In theory horses can be allergic to a range of different ingredients including alfalfa. Horses may be allergic to a particular protein in an ingredient which could trigger an immune reaction which means the ingredient should be avoided.

Is hydroxyzine safe for horses?

As hydroxyzine causes sedation, it should be used with extreme caution in working animals such as horses and dogs. Hydroxyzine has caused seizures in some dogs and probably should not be used in dogs with a history of seizures.

How long does it take for hydroxyzine to work in horses?

Hydroxyzine is well-absorbed after oral administration and generally takes 20-45 minutes to exert an effect. Antihistamines including hydroxyzine act more rapidly if given systemically although the intravenous route is more likely to cause side effects and is not used commonly.

How long does hydroxyzine take to work?

Hydroxyzine starts working very quickly. Most people will start to feel it kick in within 30 minutes and will feel its maximum effect at around 2 hours. While it's great that it gets to work quickly, keep in mind that you can also expect to feel many of its potential side effects quickly, as well.

Can you use Benadryl on horses?

Diphenhydramine (brand name: Benadryl®, Vetadryl®, Banophen®, Genahist®, Diphenhist®, Unisom®, Sominex ®) is an antihistamine used in cats, dogs, ferrets and other small mammals, birds, horses, and cattle to treat allergic reactions, motion sickness, and vomiting.

What does Queensland itch look like?

Itching is the main sign of the condition. An affected horse will rub its rump, the butt of its tail and its mane on fixed objects in its paddock or stable. It can also rub itself down the side of its chest and its ears are often affected. The constant rubbing usually causes hair loss and skin changes.

Can I use calamine lotion on my horse?

“In my experience calamine lotion is well tolerated by horses and can be helpful in decreasing the distress felt by horses suffering from the condition. However, it is a treatment and not prevention i.e. it will not stop the flies biting.” Benzyl Benzoate is an insecticide originally used to treat scabies in humans.

Is there a vaccine for sweet itch in horses?

At present there is no cure for Sweet Itch. Once an animal develops the allergy it generally faces a 'life-sentence' and every spring, summer and autumn are a distressing period for horse and owner alike. Treatment is two-fold, it consists of minimising the exposure to midges and also minimising the allergic reaction.

Is apple cider vinegar good for sweet itch?

Give the horse apple cider vinegar or garlic.

You might also be able to help prevent sweet itch by feeding your horse certain foods. The idea is to change the smell of the horse's sweat so that midges aren't attracted – and won't bite.

Is cider vinegar good for horses?

Apple Cider Vinegar works to acidify the horse's stomach for better digestion, cleansing the digestic tract. It can also aid in the absorption of minerals and helps balance the acid/alkaline ratio which is essential for good health.

Can horses have seasonal allergies?

In horses, seasonal allergies often cause a runny nose and watery eyes. Allergies are also associated with headshaking, but research shows they aren't the most common cause of this behavior. Sometimes seasonal allergies cause hives—large, raised welts all over the horse's body that may or may not be itchy.

Can you buy hydroxyzine OTC?

For instance, hydroxyzine isn't available OTC, which means you must have a prescription for it. Also, hydroxyzine isn't used to treat seasonal allergies, while OTC antihistamines are. And OTC antihistamines should not be used to treat anxiety, while hydroxyzine is.

Is hydroxyzine a controlled substance?

Hydroxyzine is not a controlled substance. It does not have the risk of addiction like some other medications used to treat anxiety e.g., lorazepam (Ativan®), alprazolam (Xanax®), clonazepam (Klonopin®), and other benzodiazepines.

Can I take hydroxyzine and Benadryl together?

Because it is an antihistamine—like Benadryl—hydroxyzine is sometimes prescribed to relieve symptoms of allergic reactions. However, hydroxyzine and Benadryl should not be used together. Hydroxyzine typically helps with skin-related symptoms of an allergic reaction, such as itching or hives.

What is hydroxyzine HCl?

Hydroxyzine is used to treat itching caused by allergies. It is an antihistamine and works by blocking a certain natural substance (histamine) that your body makes during an allergic reaction. Hydroxyzine may also be used short-term to treat anxiety or to help you feel sleepy/relaxed before and after surgery.