The use of hypoallergenic materials is a high priority for Accu-Chek. The adhesive tape is also specially designed to allow the skin underneath it to breathe. Adhesive tapes have been qualified by comprehensive biocompatibility testing. However, allergic reactions can never fully be ruled out. Sometimes they develop suddenly, even if you have used the same product for years. If an allergic reaction should occur, ask your healthcare professional about products that can help you continue a comfortable therapy.