Quick verdict
For mild, environment-related coughing in horses, the products above provide a solid starting point for owners and barn managers. Farnam Cough Free and Airmax cover the most common daily maintenance needs, while Hilton Herbs and Respira-Gold are strong choices for horses with more persistent airway sensitivity. Always consult a veterinarian before starting any treatment, particularly if coughing is accompanied by fev
Farnam Cough Free Pellets - Best for Daily Airway Support
Farnam Cough Free is one of the most widely used over-the-counter equine respiratory supplements in North America. The pellet formula combines botanical extracts including marshmallow root and licorice root, which have a long history of use as airway soothers in traditional equine care. It mixes easily into feed, which is a practical advantage for horses that resist oral syringes or drenching. The daily maintenance dose is straightforward, and the product is suitable for horses in dusty barn environments where low-grade irritation is ongoing. Many barn managers keep it on hand as a first-response option when a horse develops a mild dry cough from hay dust or seasonal changes.
Check price on Amazon →Keep your horse breathing easy with the right respiratory support. These five picks cover equine cough causes from dust to infection and help you choose the safest, most effective option.
A coughing horse is hard to ignore, and getting to the cause quickly matters for performance, welfare, and the health of other horses in the stable. Whether the problem is dusty hay, seasonal allergies, a viral infection, or the onset of equine asthma, the right respiratory support can make a real difference. The five products below are well-regarded among equine owners and cover the most common causes of equine cough. Always work with a vet to confirm the underlying cause before choosing a product.
| Product | Best For | Rating |
| — | — | — |
| Farnam Cough Free Pellets | Daily airway support | 4.5/5 |
| Airmax Respiratory Supplement | Equine asthma/heaves | 4.4/5 |
| Hilton Herbs Freeway Gold | Herbal airway support | 4.6/5 |
| Respira-Gold Liquid | Fast absorption, acute cough | 4.3/5 |
| Kentucky Performance Products Elevate | Vitamin E immune support | 4.5/5 |
Our testing process
We compare every pick against the field on real specifications, certifications, and aggregated owner reviews. We do not take payment for placement, and we flag when a product is older or sold mainly through renewed listings.
Quick comparison
| Pick | Best for | Score | |
|---|---|---|---|
| Farnam Cough Free Pellets - Best for Daily Airway Support | Check price | ||
| Airmax Respiratory Supplement - Best for Equine Asthma and Heaves | Check price | ||
| Hilton Herbs Freeway Gold - Best Herbal Airway Formula | Check price | ||
| Respira-Gold Liquid - Best for Acute Cough and Fast Absorption | Check price | ||
| Kentucky Performance Products Elevate - Best for Immune and Lung Support | Check price |
Reviewed in detail
Farnam Cough Free Pellets - Best for Daily Airway Support
Farnam Cough Free is one of the most widely used over-the-counter equine respiratory supplements in North America. The pellet formula combines botanical extracts including marshmallow root and licorice root, which have a long history of use as airway soothers in traditional equine care. It mixes easily into feed, which is a practical advantage for horses that resist oral syringes or drenching. The daily maintenance dose is straightforward, and the product is suitable for horses in dusty barn environments where low-grade irritation is ongoing. Many barn managers keep it on hand as a first-response option when a horse develops a mild dry cough from hay dust or seasonal changes.
Airmax Respiratory Supplement - Best for Equine Asthma and Heaves
Airmax is formulated specifically for horses with recurrent airway obstruction and equine asthma, conditions where ongoing bronchial inflammation makes the horse prone to coughing, flared nostrils, and labored breathing. The formula includes menthol, eucalyptus, and targeted herbal extracts designed to open airways and support mucus clearance. It comes in a powder that can be added to feed or mixed with water. Horses with heaves often need a combination of environmental changes. lower-dust bedding, soaked hay. and a supplement like Airmax to manage symptoms between vet visits. Results are more consistent when the product is used alongside reducing allergen exposure.
Hilton Herbs Freeway Gold - Best Herbal Airway Formula
Hilton Herbs is a UK-based equine herbalist brand with a strong following among natural-care horse owners. Freeway Gold combines elecampane, garlic, and marshmallow in a pelleted or loose form, targeting both the mucosal lining of the airway and the immune response that underlies chronic respiratory sensitivity. The formulation is designed for horses with ongoing low-level respiratory issues rather than acute infection, and many users report visible improvement in breathing quality and exercise tolerance after three to four weeks. The pelleted format makes it easier to measure and feed accurately than loose herbs.
Respira-Gold Liquid - Best for Acute Cough and Fast Absorption
Liquid respiratory formulas are absorbed faster than pellets, which makes them a practical choice when a horse develops an acute cough that needs quicker support. Respira-Gold combines thyme, echinacea, and vitamin C in a liquid that can be dosed by syringe or added to a small amount of soaked feed. Echinacea provides general immune support, while thyme has established antispasmodic and expectorant properties in herbal medicine traditions. This product works best as a short-term support during a flare or early respiratory illness while awaiting a vet assessment. It is not a replacement for antibiotic treatment if a bacterial infection is confirmed.
Kentucky Performance Products Elevate - Best for Immune and Lung Support
Elevate is a natural-source vitamin E supplement widely used in performance horses. While not a cough medicine in the traditional sense, vitamin E deficiency has been linked to impaired immune function and poorer recovery from respiratory illness in horses. Horses on hay-only diets. particularly in winter. often lack adequate vitamin E, and supplementing can strengthen their ability to fight off viral respiratory infections that cause coughing. Elevate uses a highly bioavailable water-soluble form of natural vitamin E, which is better absorbed than synthetic dl-alpha-tocopherol. It is a useful addition to a respiratory support plan when the horse's diet is limited in fresh pasture.
How to choose
What to consider
The most important factor is matching the product to the cause. A horse coughing from dust and hay mold needs environmental changes first, then airway-soothing supplements. A horse with confirmed equine influenza needs veterinary treatment, not just a herbal pellet. Look for products with clearly listed ingredients and established use in equine care. avoid anything with vague proprietary blends and no transparency. Check whether the product is competition-safe if your horse is actively competing, as some herbal ingredients are detectable in drug tests. Liquid formulas absorb faster but pellets are easier to include in daily feeding routines. Dosing accuracy matters with horses given their body weight.
The bottom line
For mild, environment-related coughing in horses, the products above provide a solid starting point for owners and barn managers. Farnam Cough Free and Airmax cover the most common daily maintenance needs, while Hilton Herbs and Respira-Gold are strong choices for horses with more persistent airway sensitivity. Always consult a veterinarian before starting any treatment, particularly if coughing is accompanied by fev
Common questions
Persistent coughing in horses is most often caused by dust or mold in hay and bedding, equine asthma (formerly called heaves or RAO), viral infections like equine influenza, or bacterial respiratory disease. Environmental management. wetting hay, improving stable ventilation. is usually the first step before adding any supplement or medication.
No. Human cough medicines contain ingredients like xylitol, acetaminophen, or high-dose dextromethorphan that are unsafe or untested in horses. Always use products specifically formulated for equine use and consult your vet before starting any treatment.
Herbal and nutritional respiratory supplements typically take 2 to 4 weeks of consistent use before noticeable improvement. Prescription bronchodilators or antibiotics prescribed by a vet can show results within days depending on the underlying cause. If coughing persists beyond two weeks without improvement, a veterinary exam is essential.