Calagel Medicated Anti-itch Gel is an over-the-counter medication that has a two year expiration date from the day it is manufactured. The date can be found marked near the batch code vertically on the side of the bottle label. It will be marked as "EXP month/year", so for example EXP 6/2018 would expire in June 2018. If you purchase Calagel in a box with a 2 oz. Tecnu Original inside, the expiration date will also be stamped on the bottom of the box.