Hmmm, Sorry I can't seem to find that info, is there anything indicated on the label? Depending on where you are time zone wise, if the pharmacy is still open the can answer that.
Store at Cold Temperature–Refrigerate 2°-8°C (36°-46°F)
Dispense only in the bottle and only with the calibrated dropper provided.
Discard opened bottle after 90 days.
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