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How long and under what conditions can a vial of dimenhydrinate be kept?

A vial of dimenhydrinate should be stored in a cool and dry place. If it is an unopened injectable vial, it can be stored until the expiration date indicated on the packaging. For an opened vial of dimenhydrinate, it is recommended to use it within 28 days to minimize the risk of contamination. This is due to the increased risk of contamination each time the vial is pierced for extraction, even if the product contains a preservative.