Nowadays, blood glucose test strips are generally divided into two categories. One kind is glucose oxidase test paper, such as Johnson & Johnson stability test paper, which is easily oxidized by oxygen in the air. Generally, it needs to be used up within 3 months after opening the bottle, and the validity period is about 18 months. The other is glucose dehydrogenase test paper (such as Roche-Rococo test paper), which will not be affected by oxygen in the air, so it can be used until the expiration date after opening the bottle. The validity period is also about one and a half years.
I hope it helps you.