How long do these drops keep once opened? Their preservative free products usually have to be discarded immediately

They aren’t drops, it is an ointment. I use them regularly and usually the tube is gone in 3 or 4 days, but once opened, I wouldn’t expect them to last for more than a week or two. Most people that use these drops will use the whole packet in a short period of time.

Brand	Systane
Format	Ointment

AlconSystane Nighttime Lubricant Eye Ointment 3.50 g, 0.12 Oz (Pack of 10)

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