Voltaren arthritis pain topical gel (North Bellevue)

Purchased in Feb 2022 and used about 3 times, still a lot left: "diclofenac sodium topical gel, 1% (NSAID) - arthritis pain reliever For Daily Treatment of Arthritis Pain." The box has an expiration date of Sep 2023, but online search results indicate it is not dangerous, just might not be fully effective after next month. It was stored in a cool, dry place, out of the sun. Pickup at my Bellevue home.