What Can I Use Over the Counter for an Eye Infection?

Most eye infections you can pick up as an adult are viral, and no over-the-counter product will kill the virus. What OTC products can do is manage the discomfort while your body clears the infection on its own. Artificial tears, cold compresses, and antihistamine drops form the core of what is available without a prescription, but each targets different symptoms and different causes. Choosing the wrong product or missing the signs that you need a doctor can turn a minor annoyance into something more serious.

Most Eye Infections Clear Up Without Antibiotics

The first thing worth understanding is that the most common eye infection, viral conjunctivitis (pink eye), has no FDA-approved antiviral eye drop available over the counter or by prescription for routine cases. Your immune system does the heavy lifting. Clinical trials comparing artificial tears alone against more aggressive treatments like anti-inflammatory drops have consistently found no meaningful difference in how patients recover from viral conjunctivitis. In one randomized trial, adding a topical anti-inflammatory to artificial tears shortened the illness by roughly two days on average but did not change long-term outcomes.¹ Another trial found that adding a topical NSAID to artificial tears produced no significant improvement in signs or symptoms at follow-up visits compared with artificial tears alone.²

Bacterial conjunctivitis, the second most common infectious type, is also mostly self-limiting. A systematic review in JAMA found that the majority of uncomplicated bacterial conjunctivitis cases resolve within one to two weeks without antibiotic treatment.³ There are exceptions, and they matter: conjunctivitis caused by gonorrhea or chlamydia, and infections in contact lens wearers, do need prescription antibiotics. But if you have a run-of-the-mill red, goopy eye and you are otherwise healthy, the evidence says time and comfort care will get you through.

The tricky part is that telling viral from bacterial from allergic conjunctivitis by looking in the mirror is unreliable. Even clinicians struggle with this. A review in Clinical Ophthalmology noted that clinical ambiguity between viral, bacterial, and allergic forms contributes to high rates of misdiagnosis and unnecessary antibiotic prescriptions.⁴ So while most infections are self-limiting, if your symptoms are severe, one-sided, or getting worse after a few days, see an eye care provider rather than guessing at the pharmacy shelf.

Artificial Tears Are the Workhorse

If you have a viral eye infection, artificial tears are the single most useful OTC product you can buy. They flush debris and inflammatory byproducts off the eye surface, reduce the gritty or burning sensation, and keep the cornea from drying out while the infection runs its course. Multiple randomized trials have used artificial tears as the control group against fancier treatments, and the tears consistently perform just as well for symptom relief over the full course of the illness.² A trial comparing topical steroids plus lubricant drops against lubricant drops alone for severe viral conjunctivitis found no significant difference in discomfort levels by day fourteen.⁵

You will find two broad categories on the shelf: preserved and preservative-free. The preservative most commonly used in multi-dose bottles is benzalkonium chloride (BAK). If you are using drops only a few times a day for a week or so, preserved drops are generally fine. But if you are instilling drops frequently, say every hour or two because your eyes are really miserable, the preservative itself can damage the surface cells of the cornea. Lab research has shown that BAK disrupts cellular energy production at concentrations far below those found in commercial eye drops.⁶ And a clinical comparison found that preservative-free formulations caused significantly less damage to the corneal surface than preserved ones when used frequently.⁷

The practical takeaway: if you are using artificial tears four or more times a day, go preservative-free. The single-use vials cost more but eliminate the preservative problem entirely. If you only need drops a couple of times a day, a preserved multi-dose bottle is unlikely to cause trouble.

When the Problem Is Allergy, Not Infection

Red, itchy, watery eyes are not always an infection. Allergic conjunctivitis looks similar enough that people often reach for the wrong product, and even doctors sometimes mix them up. If itching is your dominant symptom, especially if both eyes are affected equally and you also have nasal congestion or sneezing, the culprit is more likely allergies than a virus or bacterium. This distinction matters because the OTC treatment is completely different.

For allergic eyes, antihistamine or mast-cell-stabilizer eye drops are the go-to. Two widely available OTC ingredients are ketotifen (sold as Zaditor and store brands) and olopatadine (sold as Pataday). Both block histamine receptors and stabilize the mast cells that release histamine in the first place, giving you a two-pronged effect. Olopatadine has been shown to significantly reduce redness and itching compared with older antihistamine drops.⁸

Comparing olopatadine and ketotifen head to head gets interesting. A meta-analysis found that olopatadine was better at reducing redness, with a modest edge in itch relief as well.⁹ However, at least one prospective trial found the opposite pattern, with ketotifen producing higher responder rates and greater reductions in both redness and itching than olopatadine on day five and day twenty-one.¹⁰ The evidence, in other words, is genuinely mixed. Both are effective, and individual response varies enough that trying the other option is reasonable if the first one disappoints you.

The “Get the Red Out” Trap

Vasoconstrictor drops like naphazoline and tetrahydrozoline (think Visine Original and Clear Eyes) are probably the most misused OTC eye products. They work by squeezing the small blood vessels on the surface of the eye, which does make the redness disappear quickly. The problem is what happens when the drug wears off. These drops are associated with rebound redness: the blood vessels dilate even wider than before, making the eye look worse, which tempts you to use the drops again. This cycle has a clinical name, conjunctivitis medicamentosa, and it is essentially a drug-induced eye problem on top of whatever started the redness in the first place.¹¹

Beyond rebound, these drops can also lose effectiveness with continued use, a phenomenon called tachyphylaxis. Your eye stops responding to the same dose, so you instill more, and the cycle worsens.¹² Additional side effects include burning on instillation and temporary pupil dilation. If you have a red eye from an infection, vasoconstrictor drops mask the symptom without addressing the cause, which can delay proper treatment. Unless you need cosmetically white eyes for a specific event and plan to use the drop once, these products create more problems than they solve during an active infection.

Lid Hygiene Products for Chronic or Low-Grade Problems

Not every eye infection feels like classic pink eye. Blepharitis, a chronic inflammation of the eyelid margins, involves bacterial overgrowth along the lash line and can cause redness, crusting, and a sandy or burning sensation that people often mistake for an infection of the eye itself. The mainstay of treatment is lid hygiene: warm compresses to loosen clogged oil glands, followed by gentle cleaning of the lid margins.

You can do this with a clean washcloth and diluted baby shampoo, but OTC lid scrubs and sprays have become popular. Hypochlorous acid sprays in particular have some evidence behind them. A randomized study found that hypochlorous acid lid hygiene significantly improved tear film stability and reduced bacterial load on the eyelids after one month, outperforming a hyaluronic acid-based cleanser on several measures.¹³ Hypochlorous acid is the same molecule your white blood cells produce to kill bacteria, and in dilute spray form it is gentle on the skin. Pre-moistened lid wipes containing tea tree oil are another option, though the evidence for them is thinner.

Lid hygiene products are not a substitute for medical treatment if the infection is severe or spreading. But for that chronic, low-grade grittiness and crusting that comes and goes over months, consistent daily lid cleaning is the single best thing you can do and everything you need is available OTC.

Cold Compresses and Simple Home Measures

Sometimes the most effective “treatment” does not come in a bottle at all. A cold compress, a clean washcloth soaked in cool water and draped over closed eyes for five to ten minutes, reduces swelling and soothes the itch and burn of viral or allergic conjunctivitis. Several clinical trial protocols for viral conjunctivitis include cold compresses as part of the standard supportive care arm alongside lubricant drops and oral pain relievers as needed.⁵

Washing your hands frequently and avoiding touching your eyes are not treatments per se, but they prevent you from spreading a viral infection to your other eye or to other people. Viral conjunctivitis is extremely contagious. If you are sharing a household, use separate towels, pillowcases, and washcloths. Replace or disinfect any eye makeup you used in the days before the infection appeared. These basic hygiene measures do more to limit the scope of the infection than any drop you can buy.

Keeping Your Drops Clean

An eye drop bottle that becomes contaminated can introduce new bacteria to an already vulnerable eye. A review spanning thirty years of literature found that the dropper tips of in-use eye drop bottles showed contamination rates ranging from about 8% to as high as 100% of tested samples, depending on the setting and how long the bottle had been open.¹⁴ Multi-use bottles shared between patients in clinical settings had contamination rates that increased sharply over time.

To minimize risk at home, never touch the dropper tip to your eye, eyelid, or fingers. Replace the cap immediately after use. Discard multi-dose bottles about four weeks after opening, even if they are not empty. Preservative-free single-use vials sidestep much of this risk because each vial is used once and discarded. A retrospective analysis of FDA recalls of artificial tear products from 2014 to 2025 found that the majority of class I recalls, the most serious category, were due to microbial contamination.¹⁵ Buying from reputable brands and checking for any ongoing recalls before using a new product is a simple precaution.

Eye Drop Technique Matters More Than You Think

How you instill drops affects both how well they work and whether they cause unwanted side effects elsewhere in your body. Eye drops are highly concentrated, and anything not absorbed by the eye can drain through the tear duct into the nasal cavity and from there into the bloodstream. A review of systemic side effects from eye drops noted that this route can produce surprisingly high blood levels of the active ingredient, especially in children, whose dosing is the same as adults but whose body weight is much lower.¹⁶

To get the most benefit and limit absorption into the rest of your body, tilt your head back, pull down the lower lid to create a small pocket, and place one drop into that pocket without touching the tip to any surface. After instilling the drop, close your eye gently and press lightly on the inner corner near the nose for about a minute. This simple step, called punctal occlusion, blocks the drainage pathway and keeps more of the drug on the eye where you want it. If you are using more than one type of drop, wait at least five minutes between them so the first drop is not washed away by the second.

Contact Lens Wearers Face Higher Stakes

If you wear contact lenses and develop a red, painful eye, do not treat it at home with OTC drops and hope for the best. Contact lens wear is a well-established risk factor for bacterial keratitis, a corneal infection that can scar and permanently reduce your vision. The annual rate of contact-lens-associated keratitis is roughly two to four cases per ten thousand wearers, and bacteria account for about 90% of those infections.¹⁷ That may sound low, but keratitis caused by organisms like Pseudomonas can progress alarmingly fast, sometimes within hours.

Remove your contact lenses immediately at the first sign of infection. Do not put them back in until a doctor tells you it is safe. Artificial tears labeled “for contact lens wearers” are fine to use for comfort while you wait for your appointment, but they are not a treatment for keratitis. You will almost certainly need prescription antibiotic drops, and possibly intensive hourly dosing, to clear the infection. The same JAMA review that described bacterial conjunctivitis as mostly self-limiting specifically excluded contact lens wearers from that reassurance, recommending antibiotic treatment for them.³

When OTC Is Not Enough

Self-treatment makes sense for a mild, bilateral pink eye in an otherwise healthy adult, especially during cold and flu season or an outbreak at work or school. But several situations call for professional evaluation rather than a trip to the pharmacy:

Pain: Mild irritation and a gritty feeling are normal with conjunctivitis. Actual pain, especially sharp or throbbing pain, suggests something deeper than a surface infection, possibly keratitis, uveitis, or acute glaucoma.
Vision changes: Blurriness that does not clear with blinking, sensitivity to light, or seeing halos around lights are warning signs that the infection has moved beyond the conjunctiva.
One eye only with thick discharge: Unilateral infections with heavy purulent discharge are more likely bacterial and more likely to need prescription treatment, especially if gonococcal or chlamydial infection is a possibility.
No improvement after a week: Viral conjunctivitis typically peaks around days three to five and then gradually improves. If you are getting worse or no better after seven to ten days, a doctor should take a look.
Recent eye surgery or trauma: Any redness or discharge after a procedure or an injury to the eye needs urgent professional attention.
Immune compromise: People taking immunosuppressive medications or living with conditions that weaken the immune system may not clear infections as effectively and should have a lower threshold for seeking care.

Newborns and Young Children

Eye infections in babies are a different situation entirely. Neonatal conjunctivitis, appearing in the first four weeks of life, can be caused by bacteria contracted during delivery, including gonorrhea and chlamydia, and untreated cases risk permanent sight loss or widespread infection.¹⁸ OTC products have no role here. Any newborn with a red or discharging eye needs same-day medical evaluation.

Older children with pink eye can use artificial tears for comfort, but keep in mind that eye drop dosing is not adjusted for weight in children. Systemic absorption of even OTC ingredients can be proportionally much higher in a small child than in an adult.¹⁶ Stick to preservative-free artificial tears in children, avoid vasoconstrictor drops entirely, and see a pediatrician if there is any doubt about the cause.

Your Eyes Have Their Own Defense System

One reason most eye infections resolve without prescription treatment is that the eye is not as vulnerable as it might seem. Tears are not just salt water. They contain proteins like lysozyme and lactoferrin that actively kill or inhibit bacteria and other pathogens.¹⁹ The tear film also contains antimicrobial peptides and surfactant proteins that form a chemical barrier against infection.²⁰ Blinking constantly spreads this antimicrobial cocktail across the cornea and physically sweeps debris toward the drainage system.

This built-in defense is the reason artificial tears work as well as they do. By keeping the tear film intact and washing away the products of infection, you are supporting a system that is already very good at protecting itself. The goal of OTC treatment is not to replace your immune response but to keep your eye comfortable while the immune response does its work. That framing helps explain why more aggressive OTC products, the ones promising to “cure” or “treat” infections, are usually unnecessary and sometimes counterproductive.

1
PubMed. Dexamethasone/Povidone Eye Drops versus Artificial Tears for Treatment of Presumed Viral Conjunctivitis: A Randomized Clinical Trial
2
Arquivos Brasileiros de Oftalmologia. Artificial tears alone versus 0.45% ketorolac tromethamine with artificial tears for the treatment of acute viral conjunctivitis
3
PubMed Central. Conjunctivitis: a systematic review of diagnosis and treatment
4
PubMed Central. A Review of the Differential Diagnosis of Acute Infectious Conjunctivitis: Implications for Treatment and Management
5
INDIAN JOURNAL OF APPLIED RESEARCH. EFFICACY OF TOPICAL STEROIDS IN TREATING SEVERE VIRAL CONJUNCTIVITIS: A RANDOMIZED CONTROL TRIAL
6
PubMed Central. The Eye Drop Preservative Benzalkonium Chloride Potently Induces Mitochondrial Dysfunction and Preferentially Affects LHON Mutant Cells
7
JAMA Ophthalmology. Preservative-Free Artificial Tear Preparations: Assessment of Corneal Epithelial Toxic Effects
8
PubMed Central. Treatment of allergic conjunctivitis with olopatadine hydrochloride eye drops
9
PubMed Central. Comparison of olopatadine with ketotifen for allergic conjunctivitis: a meta-analysis study
10
PubMed. Ketotifen fumarate and olopatadine hydrochloride in the treatment of allergic conjunctivitis: a real-world comparison of efficacy and ocular comfort
11
PubMed Central. Treating the Ocular Component of Allergic Rhinoconjunctivitis and Related Eye Disorders
12
PubMed Central. Over-the-Counter Ocular Decongestants in the United States – Mechanisms of Action and Clinical Utility for Management of Ocular Redness
13
PubMed Central. Hypochlorous acid hygiene solution in patients affected by blepharitis: a prospective randomised study
14
PubMed Central. Highlighting the Microbial Contamination of the Dropper Tip and Cap of In-Use Eye Drops, the Associated Contributory Factors, and the Risk of Infection: A Past-30-Years Literature Review
15
PubMed Central. Retrospective analysis of U.S. Food and Drug Administration recalls of artificial tear solutions from 2014 to 2025
16
PubMed Central. Systemic side effects of eye drops: a pharmacokinetic perspective
17
PubMed Central. Contact Lens–Associated Keratitis—an Often Underestimated Risk
18
BMJ. Approach to conjunctivitis in newborns
19
PubMed Central. Tear Lactoferrin and Lysozyme as Clinically Relevant Biomarkers of Mucosal Immune Competence
20
PubMed Central. Antimicrobial compounds in tears