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.
Posts. 17. I wouldnt use it. Im not an expert or anything but i remember hearing that usually stuff in plastic bottles (like bottled water) expires not because the product is no good but because the plastic in the bottle starts to break down and get into the product or something like that.