The vial opening date is its own field

The vial opening date is its own field

Blog Article

There are at least three dates attached to a vial and people routinely collapse them into one. The manufacturer expiry printed on the label. The date you reconstituted it. And the date you first drew from it. They are different and only one of them is on the label.

The expiry date governs the unopened product. The reconstitution date starts the clock on the made up solution, and that clock is usually much shorter than the printed expiry. The first use date matters if your storage guidance is written in terms of in use time rather than time since mixing. If you only record one, you will eventually apply the wrong rule.

Recording all three costs about ten seconds when you open a vial and removes an entire category of uncertainty. It also means that when you find a vial in the fridge and cannot remember its history, you look it up rather than making a judgement call about something you cannot actually assess by eye.

The derived number to compute from them is a use by date for the reconstituted solution, and that is the one that should be written on the vial itself in marker. Not the expiry from the box. The date you must stop using this specific vial. A Peptide Tracker & Calculator that computes it from your mixing date and storage guidance gives you the number to write.

When a vial reaches that date with solution left in it, that is not waste to be avoided by stretching the rule. It is a supply planning problem to fix on the next vial, by mixing a volume that matches the doses you will actually give in the window.

Report this page