When incompatible blood is given, antibodies and complement in the recipient plasma attack the antigens on the donor RBC. Hemolysis ensues The antigen-antibody complex activate the Hageman factor (factor XII), which acts on the kinin system to produce bradykinin
Still it is not advisable to take it after the expiry date written on the bottle. This is just for your information to let you know that you are safe. Anyway Saline Nasal spray is not going to do any harm even if you used an expired one. So forget about it.
Each bottle of AquaChek test strips is clearly marked with an expiration date. We cannot guarantee the accuracy of the test strips beyond the expiration date on the bottle and therefore recommend replacing out-of-date strips. Storage in high heat or humid conditions will shorten expected shelf life.