Flurbiprofen Eye Drops for Horses: Uses & Side Effects

This information is for educational purposes only. Never give your pet any medication without your veterinarian's guidance. Dosing, frequency, and safety depend on your pet's specific health profile.

Flurbiprofen ophthalmic is a topical nonsteroidal anti-inflammatory drug (NSAID) used in the eye. The commercially available solution is typically 0.03%, and it works by reducing prostaglandin production, which helps calm inflammation inside the eye. In horses, your vet may prescribe it extra-label as part of an eye treatment plan, especially for painful inflammatory conditions such as uveitis.

In equine medicine, flurbiprofen is not usually the only medication in the plan. Eye inflammation often needs a combination approach that may include atropine, systemic anti-inflammatory medication, antimicrobial therapy if infection is present, and frequent rechecks. Flurbiprofen is generally considered less potent than topical steroid eye medications, but it can offer a wider safety margin when there is concurrent corneal disease and your vet wants an anti-inflammatory option with less risk than a steroid.

Because horse eye problems can worsen quickly, this medication should never be started without an exam. Your vet may need fluorescein stain, tonometry, and a full ophthalmic exam first to make sure the eye is not ulcerated, infected, or developing complications such as glaucoma.

Flurbiprofen eye drops are most often used in horses for anterior uveitis or equine recurrent uveitis (ERU) as part of a broader anti-inflammatory plan. The goals are to reduce inflammation, improve comfort, and help protect vision. Merck notes that topical NSAIDs such as flurbiprofen 0.03% and diclofenac 0.1% are used in horses with uveitis, especially when your vet wants topical anti-inflammatory support and a wider safety margin in eyes with concurrent corneal disease.

Your vet may also use flurbiprofen in severe ophthalmic emergencies alongside other medications. In more serious uveitis cases, topical steroids are often the mainstay, but a topical NSAID may be added at a similar frequency when inflammation is intense. That said, the right plan depends on whether the horse has a corneal ulcer, infection, trauma, glaucoma risk, or recurrent disease.

This medication is not a substitute for diagnosis. A red, cloudy, squinting, or tearing eye can be caused by ulcers, foreign bodies, fungal keratitis, trauma, or glaucoma. Those conditions can look similar at home but need very different treatment choices. That is why your vet will usually tailor flurbiprofen use to the exact eye findings rather than using it as a one-size-fits-all drop.

Always use flurbiprofen eye drops exactly as your vet prescribes. In horses with uveitis, Merck states that topical NSAIDs such as flurbiprofen may be started every 4 to 6 hours, with frequency adjusted based on how severe the inflammation is and how the eye responds. In severe equine eye emergencies, topical NSAIDs may be used at roughly the same every 6 to 8 hour schedule as other anti-inflammatory eye medications, depending on the case.

Horse eye medications often need very frequent dosing early on. As the eye improves, your vet may taper the schedule gradually rather than stopping suddenly. Merck also notes that treatment for active uveitis may continue for about 1 month after complete resolution of active inflammation, because stopping too soon can allow inflammation to flare again.

Before giving the drops, wash your hands, avoid touching the bottle tip to the eye or eyelids, and give each medication in the order your vet recommends. If your horse is on more than one eye medication, your vet may ask you to separate them by several minutes so one drop does not wash the next one out. If you miss a dose, contact your vet for guidance rather than doubling the next dose.

The most commonly reported side effects with ophthalmic flurbiprofen are temporary burning, stinging, and mild eye irritation right after the drop is placed. Some patients may also develop increased redness. In the human product labeling, other reported ocular reactions include ocular hyperemia, bleeding inside the eye such as hyphema, and changes in pupil size, although these are not the most common reactions.

A more important practical concern in horses is that topical NSAIDs may slow or delay healing. This matters when the cornea is injured. If your horse has a corneal ulcer, stromal loss, or a complicated eye injury, your vet will weigh the benefits and risks carefully and may change the plan as the eye changes.

See your vet immediately if your horse develops worsening squinting, more tearing, a cloudier eye, increased discharge, visible blood in the eye, a suddenly more painful appearance, or if the eye seems less open after starting treatment. Those signs may mean the underlying eye problem is progressing rather than a routine medication reaction.

Flurbiprofen eye drops are often used with other eye medications, but interactions are still important. DailyMed notes that interactions with other topical ophthalmic medications have not been fully investigated. It also warns that topical NSAIDs and topical corticosteroids used together may increase the potential for healing problems, so your vet will decide whether that combination makes sense for your horse's specific eye condition.

There is also potential cross-sensitivity with aspirin and other NSAIDs. If your horse has had a prior reaction to NSAIDs, tell your vet before using flurbiprofen. In surgical settings, flurbiprofen may increase bleeding risk in ocular tissues, so caution is advised in patients with bleeding tendencies or those receiving other medications that may prolong bleeding time.

In horses with uveitis, topical therapy is commonly paired with systemic anti-inflammatory drugs such as flunixin. Merck advises monitoring renal function carefully with systemic NSAID use and using extreme care if the horse is also receiving gentamicin, because that combination can increase kidney risk. While that warning applies to the overall treatment plan rather than a direct flurbiprofen-only interaction, it is a good reminder to make sure your vet knows every eye drop, oral medication, injectable drug, and supplement your horse is receiving.