How long do eye drops last after opening?

The answer for any eye drop comes from its own label. Quell’s Drug Facts label doesn’t set a number of days or weeks to discard the bottle after opening. It gives a storage range, an expiration date on the package, and a do-not-use rule if the liquid changes color. If you want a specific after-opening limit, ask your pharmacist or call the company rather than guessing.

How long do eye drops last after opening, according to the label?

Labels differ by product, which is why online answers vary so much. Some eye drop packages print a discard period after opening, and some don’t. The only reliable answer is the one on the package in your hand.

For Quell, the over-the-counter Drug Facts panel covers the bottle’s life in four places:

• Storage: Store between 15° to 30°C (59° to 86°F).
• Do not use: If this product changes color.
• When using: Do not touch tip of bottle to any surface to avoid contamination.
• Other information: Product appears as a milky brown solution.

None of those lines sets a time limit after opening. That isn’t an invitation to keep a bottle forever; it means the label doesn’t give a figure, and nobody should invent one for it. The full panel is on the Drug Facts page.

What the expiration date tells you

Every bottle and carton carries an expiration date. Past that date, don’t use it, opened or not. The date applies to the product as it was made and stored; it isn’t a promise that an opened bottle stays in the same condition until then, which is exactly why the questions below matter. Where is the expiration date on eye drops? shows how to find and read it.

How long do eye drops stay good once opened?

In practice, how long an opened bottle stays usable depends on how it’s been handled, and you’re the one who knows that. Three questions help:

• Has it stayed within the label’s storage range? Days in a hot car or a freezing garage take it outside Store between 15° to 30°C (59° to 86°F).
• Has the tip stayed clean? Touching the tip to an eye, a finger or a counter is what the label warns against.
• Does it look the way it should? The eye drops have a naturally milky-brown appearance. This is normal and does not indicate a problem with the product. A different color is a stop sign under the label’s do-not-use rule.

If the answer to any of those is no, or you’re not sure, replace the bottle. A new one costs less than the worry. Check the expiration date on any sealed spare before you open it, too.

Does preservative-free change the answer?

Quell is preservative-free, which is a choice about what’s in the formula. People sometimes assume preservative-free drops must be thrown out within a set number of days after opening, but Quell’s label doesn’t say that, and this guide won’t add a rule the label doesn’t contain. Your pharmacist can explain how preservative-free, multi-dose bottles are generally handled and whether they’d suggest a personal limit. What does preservative-free mean? covers the term itself.

How long does one bottle actually last?

A separate question, and one the label helps with. The directions read: Apply 1 drop 3 times per day in each eye. Following them, most people use up a bottle well before any expiration date. A bottle holds .33 fl oz (10 mL). How long does a bottle of eye drops last? works through the arithmetic, so you can plan when to reorder rather than stretching an old bottle.

Habits that keep an opened bottle in good shape

• Wash your hands before each use.
• Keep the tip off your eye, lashes, fingers and every surface.
• Cap the bottle right after each use.
• Store it indoors, out of direct sun, within the labeled range; a drawer or a bag that stays with you works.
• Use one bottle at a time. Leave spares sealed until you need them.
• Write the date you opened it on the carton if that helps you keep track.
• Don’t share a bottle with anyone else.

Signs to stop using an opened bottle

• The liquid has changed color from its usual milky brown.
• The expiration date has passed.
• The tip touched something, or the cap was left off for a long time.
• It was stored outside the label’s range.
• Your eyes feel worse after using it, not better.

That last one is about you, not the bottle. Quell’s label says: Stop use and ask a doctor if you feel eye pain or changes in your vision, if irritation or redness continues, or if the condition worsens or persists for 72 hours. How do I know if my eye drops have gone bad? goes deeper into what to look for in the bottle itself.

Who to ask for a specific answer

A pharmacist can answer “how long should I keep this open bottle?” for your situation. You can also call Aurora Pharmaceuticals, LLC at 615.465.6041, M–F 9AM–5PM CST. Have the lot number and expiration date from the package handy. For how to throw away an old bottle, see How to dispose of eye drops.