For longer lashes
To get the best results and avoid any possible adverse reaction from expired product, I recommend using a non-expired product. You should apply the Latisse once a day at the base of the upper eyelashes to grow thicker longer and darker lashes. See link below. Best, Dr. Emer
Hi that is a great question! I would not suggest using a product that is expired. You can find the expiration date on the bottom of the box.