How Long Do Eye Drops Last? Expiry and Storage

Key takeaways

• There is no single discard date for eye drops. Real US labels disagree with each other: TheraTears says 45 days after opening, Refresh Tears, Oasis Tears PF and Systane Ultra PF say 90, and some labels give no period at all.
• The "do not reuse, once opened discard" line on single-use vials is not a manufacturer preference. It is wording the FDA requires on single-use ophthalmic containers.
• Preservative-free multi-dose bottles do not buy you longer in use. The ones we checked state the same 90 days as a preserved bottle.
• The dropper tip is the part that picks up contamination, more than the liquid inside, and the organisms found on it are ordinary skin and eyelid bacteria.
• Labels specify room temperature, commonly 59 to 77 degrees Fahrenheit. None of the labels we checked tells you to refrigerate.

The short version

Read your own bottle. That sounds like a dodge, and it is not: we checked the FDA labels for seven artificial tears sold in the United States and they do not agree with one another. Any article that gives you one number for all eye drops is telling you about one product and hoping it generalises.

What follows is what the labels and the regulations actually say, and where they say nothing at all.

The expiry date on an unopened bottle

An unopened bottle carries an expiration date, and the labels tell you to respect it. Refresh Tears puts it plainly in its Other information section: "Use before expiration date marked on container." Optase Dry Eye Intense single-dose units carry "Do not use after the expiry date shown on the pack."

One practical wrinkle catches people out. Federal labeling rules allow the date for single-dose containers packed in cartons to appear on the carton rather than on the container itself. So if you tear a strip of vials off and throw the box away, you may have thrown away the only expiry date you had. Keep the carton, or write the date on the strip.

Discard after opening: the numbers do not agree

This is the part worth knowing, because the advice circulating online has flattened it into a single rule that does not exist.

Product	What the label says
TheraTears Lubricant Eye Drops	Discard 45 days after opening
Refresh Tears	Discard 90 days after opening
Refresh Tears PF	Discard 90 days after opening
Oasis Tears PF	Discard 90 days after opening
Systane Ultra PF	Discard 90 days after opening
Blink Tears	No discard period stated on the label

TheraTears is half the period of the others. Both figures are correct, for their own product. The manufacturer sets that number against its own formulation, preservative system and container, and there is no reason a drop from one brand should inherit another brand's clock.

Two further things follow. If your bottle states no period, as Blink Tears does not, you cannot borrow 90 days from a different brand and call it guidance. And the discard period is not always printed where you expect: on Alcon labels it sits under Directions, not under Other information, so if you cannot find it in the box at the bottom, read the directions again.

A practical habit that costs nothing: write the date you opened it on the bottle. Nobody remembers.

Single-use vials, and the question everyone actually has

Preservative-free vials carry a required warning. Federal regulation sets the wording for single-use ophthalmic containers: "To avoid contamination, do not touch tip of container to any surface. Do not reuse. Once opened, discard."

Compare that with the wording the same regulation requires on multi-use containers: "To avoid contamination, do not touch tip of container to any surface. Replace cap after using." The reuse sentence is deliberately absent. That difference is the whole point of a vial.

Now the honest part. The question people actually ask is whether you can cap a vial in the morning and use the rest at lunchtime. Every US label we checked says to discard it once opened, and none of them offers a keep-it-for-later window. They also do not quantify what happens if you do. TheraTears preservative-free states that re-use "may lead to inflammation of the eye and/or discomfort, based on potential contamination during handling", and that hedging is the manufacturer's own. So the accurate answer is that the labels tell you to discard, and none of them publishes a safe interval for doing otherwise. We are not going to invent one.

One number that gets misread: TheraTears vials say to use individual vials within 90 days of opening the foil pouch. That 90 days belongs to the pouch, not to a vial you have already twisted open.

Preservative-free bottles with a valve

Multi-dose preservative-free bottles use a one-way valve or filter so the contents stay protected without a preservative. It is a genuinely clever piece of engineering, and it is worth being clear about what it does not do.

On the US labels we checked, it does not extend the in-use period. Oasis Tears PF and Systane Ultra PF both state 90 days after opening, the same as preserved Refresh Tears. The valve removes the preservative from the formula. It does not move the clock.

Storage: what labels actually specify

Most say room temperature, and several put a number on it. Refresh Tears and TheraTears both specify 59 to 77 degrees Fahrenheit, or 15 to 25 Celsius. Blink Tears says the same. Oasis Tears PF is the outlier, permitting 41 to 77 degrees Fahrenheit while warning to protect from light and freezing.

That upper limit of 77 degrees is doing more work than people realise. The National Weather Service reports that the temperature inside a parked car can rise 20 degrees in ten minutes and approach 150 degrees within an hour, even when the outside air is in the 70s. A bottle left in a glove compartment spends its afternoon well outside the range its stability testing was based on. We cannot tell you what that does to the drops, because we did not find published data on heat exposure and artificial tears specifically. What we can say is that expiry dates are set against the storage conditions stated on the label, so a bottle that has lived in a hot car is a bottle whose date was validated under conditions it did not experience.

On the bathroom cabinet, general medicines guidance from MedlinePlus notes that "the heat and moisture from your shower, bath, and sink may damage your medicines", and suggests a dresser drawer or a kitchen cabinet away from heat instead. Note the "may": that is guidance for medicines in general, not a finding about eye drops.

On refrigerating drops because they feel soothing: no label we checked advises it. Oasis permits down to 41 degrees and warns against freezing; the rest specify room temperature. There is no instruction either way, so this is a question for your own eye doctor rather than something a web page should rule on.

The dropper tip is the part that matters

Every label repeats the same instruction, because the regulation requires it: do not touch the tip to any surface. Not just your eye. Any surface.

There is a reason that instruction targets the tip. A study of extended-use drops in an ophthalmology clinic found the dropper tip contaminated more often than the liquid left in the bottle, 50 percent against 33 percent, and the organisms were overwhelmingly coagulase-negative staphylococci, which the authors describe as "common commensal flora of the ocular conjunctiva and skin". In other words, the contamination is mostly you.

Read that study for what it is. The products tested were preserved diagnostic drops used on many patients in a busy clinic, not one person's artificial tears at home, so the exposure is far heavier than yours. A wider systematic review of 33 studies and 4,600 samples put in-use contamination of ophthalmic medications at around 10 percent. Contamination of a bottle is not the same thing as an infection in a person, and none of this literature establishes an infection rate for home artificial tear users.

The National Eye Institute's practical advice is short: wash your hands first, do not touch the tip of the bottle with your hands, and do not let the tip touch your eye or eyelid.

When a recall is the reason, not your storage

In 2023 the FDA warned consumers to stop using EzriCare and Delsam Pharma Artificial Tears over bacterial contamination. The CDC's final update recorded 81 patients across 18 states, with 14 people losing vision, 4 having an eye surgically removed, and 4 deaths within 30 days of a positive culture. The FDA's inspection cited manufacturing failures including inadequate microbial testing and multi-use bottles sold without an adequate preservative.

That is worth understanding correctly, because it is often used to argue for careful storage. It does not support that argument. No storage habit or tip hygiene would have prevented it. It was a manufacturing failure, and the consumer protection against it is buying from established brands and paying attention to recall notices.

A separate FDA action in October 2023 covered 26 products across CVS Health, Leader, Rugby, Rite Aid, Target Up and Up, Velocity Pharma and Walmart, on the basis of insanitary manufacturing conditions. The FDA stated at the time that it had "not received any adverse event reports of eye infection associated with these products". That one was precautionary. Treating the two events as the same thing overstates both.

What to do with all of this

Five habits cover almost everything above. Write the opening date on the bottle. Read your own label for the discard period rather than assuming 90 days. Keep the carton if your vials came in one, because the expiry date may only be there. Do not let the tip touch anything, including your eyelashes. Keep drops out of the car and out of the bathroom.

And if your eyes are painful, one-sided, very red, light-sensitive, discharging, or your vision has changed, none of this is the issue. That is an appointment, not a storage question.

Frequently asked questions

How long can I use eye drops after opening them?

It depends on the product, and the labels genuinely disagree. TheraTears states 45 days after opening. Refresh Tears, Refresh Tears PF, Oasis Tears PF and Systane Ultra PF state 90 days. Some labels, such as Blink Tears, state no period at all. Read the bottle you own.

Can I use eye drops after the expiry date?

The labels tell you not to. Refresh Tears states "Use before expiration date marked on container." An expiry date is set by stability testing under the storage conditions printed on the label, so it is a statement about a product kept as instructed, not a guess.

Can I save a preservative-free vial for later in the day?

Every US label we checked says to discard the vial once it is opened, and none offers a window for keeping it. The required warning for single-use containers reads "Do not reuse. Once opened, discard." The labels do not quantify the risk of doing otherwise, so we cannot tell you how long is acceptable, because nobody publishes that.

Do preservative-free bottles last longer than preserved ones?

Not according to their labels. Oasis Tears PF and Systane Ultra PF both state 90 days after opening, the same as preserved Refresh Tears.

Should I keep my eye drops in the fridge?

No label we checked instructs you to. Most specify room temperature, commonly 59 to 77 degrees Fahrenheit. Oasis Tears PF permits down to 41 degrees and warns against freezing. If cold drops feel better to you, ask your eye doctor about your specific product.

Is it bad to keep eye drops in the bathroom?

General medicines guidance from MedlinePlus says heat and moisture from a shower, bath or sink may damage medicines, and suggests a drawer or a cabinet away from heat instead. That is guidance for medicines broadly rather than a finding about eye drops.

What happens if the dropper tip touches my eye?

Every label carries the same warning against it, and clinic research has found the tip more often contaminated than the liquid inside, mostly with ordinary skin and eyelid bacteria. Contamination is not the same as infection, but the instruction is on the label for a reason, and it costs nothing to follow.

Why do my drops say 45 days when my friend's say 90?

Because the manufacturer sets that period against its own formulation, preservative system and container. Neither is wrong. Yours is the one that applies to you.

Sources

1. 21 CFR 349.50, required warnings for ophthalmic drug products. Electronic Code of Federal Regulations.
2. 21 CFR 201.17, expiration date placement on the immediate container and outer package.
3. 21 CFR 211.137, expiration dating and its relationship to labeled storage conditions.
4. DailyMed Drug Facts labels, National Library of Medicine: Refresh Tears, Refresh Tears PF, TheraTears Lubricant Eye Drops, TheraTears preservative-free, Oasis Tears PF, Systane Ultra PF, Blink Tears, Optase Dry Eye Intense SDU.
5. Chua SW, Mustapha M, Wong KK, et al. Microbial Contamination of Extended Use Ophthalmic Drops in Ophthalmology Clinic. Clinical Ophthalmology. 2021;15:3147-3152.
6. Kyei S, Asiamah R, Owusu S, Masango NE. Microbial Contamination of Eye Drops: A Systematic Review and Meta-analysis. Journal of Patient Safety. 2025.
7. National Eye Institute. How to put in eye drops.
8. US Food and Drug Administration. Warning on EzriCare and Delsam Pharma Artificial Tears, 2023; warning on certain eye drops from several major brands, October 2023.
9. Centers for Disease Control and Prevention. Outbreak of extensively drug-resistant Pseudomonas aeruginosa associated with artificial tears, final update May 2023.
10. MedlinePlus, National Library of Medicine. Storing your medicines.
11. National Weather Service. Heat and vehicle interior temperatures.