Travoprost Side Effects: What to Expect and When to Call Your Doctor

Travoprost (brand name Travatan Z) is one of the most widely used eye drops for glaucoma, and for most patients it is very well tolerated. But like all medications, it has a range of side effects — from the very common (red eyes) to the unusual but important (permanent eye color change). Here's a complete guide to what travoprost can do to your eyes and body, and what to watch out for.

The Most Common Side Effect: Eye Redness (Ocular Hyperemia)

The most frequently reported side effect of travoprost is eye redness (conjunctival hyperemia), which occurs in 30% to 50% of patients in controlled clinical trials. This redness is caused by blood vessel dilation and typically appears in the whites of the eyes. It is often most noticeable in the first few weeks of treatment and may improve over time. About 3% of patients discontinue travoprost specifically because of this side effect.

Brand Travatan Z uses the sofZia preservative system, which is gentler on the eye surface compared to benzalkonium chloride (BAK) found in many generic travoprost products. If you notice significant or persistent eye redness with a generic formulation, ask your ophthalmologist about switching to the sofZia-preserved Travatan Z or an ionic-buffered generic.

Other Common Side Effects (5-10% of Patients)

Decreased visual acuity: Temporary blurring, usually immediately after instillation

Eye discomfort or pain: Mild stinging or burning after application, typically brief

Foreign body sensation: Feeling like something is in the eye

Eye pruritus (itching): Itchiness around the eye

Less Common Side Effects (1-4% of Patients)

Blepharitis (eyelid inflammation)

Blurred vision beyond the initial drop application

Cataracts (reported in clinical trials, relationship to drug uncertain)

Conjunctivitis (eye infection symptoms)

Dry eye

Keratitis (corneal inflammation)

Lid margin crusting

Photophobia (light sensitivity)

Subconjunctival hemorrhage (blood spot in the white of the eye)

The Unique Side Effects: Eye and Eyelash Color Changes

Travoprost is well-known for causing cosmetic changes that can be permanent:

Iris pigmentation (eye color change): Travoprost increases melanin content in the iris, causing the eye to gradually turn brown. This change is permanent even after stopping travoprost. It can take months to years to appear and is most noticeable in eyes that are mixed-colored (blue-brown, green-brown, grey-brown). Patients with uniformly brown eyes may not notice any visible change.

Eyelid/periorbital skin darkening: The skin of the eyelid and surrounding area may also become darker. This change may be reversible after stopping the medication.

Eyelash changes: Travoprost causes eyelashes to become longer, thicker, and darker. These changes are usually reversible after stopping the drug. (Note: bimatoprost, a related drug, is marketed as Latisse specifically for this eyelash growth effect.)

These cosmetic changes are not harmful to eye health but are important to know about before starting treatment — especially if you are treating only one eye, as it could result in permanent asymmetry in eye color between the two eyes.

Serious Side Effects: When to Call Your Doctor Immediately

Seek prompt medical attention if you experience:

Macular edema: Swelling of the central part of the retina. Symptoms include blurred or distorted central vision. Higher risk in aphakic patients (no lens) or those with torn posterior lens capsule.

Uveitis/iritis: Eye inflammation — symptoms include severe eye pain, redness, light sensitivity, and blurred vision. Use travoprost with caution if you have active uveitis.

Bacterial keratitis: Eye infection from contamination of the multi-dose bottle. Symptoms: severe pain, redness, discharge, vision changes. Prevent by never touching the dropper tip to your eye or any surface.

Severe allergic reaction: Hives, swelling of the face or throat, difficulty breathing. Get emergency help immediately.

Tips to Minimize Side Effects

Apply at bedtime — eye redness is less noticeable while sleeping

Press gently on the inner corner of your eye (punctal occlusion) for 1 minute after applying the drop to minimize systemic absorption

Remove contact lenses before applying; wait 15 minutes to reinsert

Never touch the dropper tip to your eye, hands, or other surfaces to prevent contamination

See also: Travoprost Drug Interactions: What to Avoid and What to Tell Your Doctor.

Want a full overview of travoprost? Read: What Is Travoprost? Uses, Dosage, and What You Need to Know in 2026.