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.
BestAllergySites 0 December 17, 2009 2:00 pm. The short answer to this question is yes, EpiPens do expire. The expiration date should be stamped on the label on the Epi-Pen. When picking up your EpiPens at the pharmacy, you should open the package to ensure that the expiration date is at least a year out. Sometimes the pharmacy will give you one that is near itâs expiration date by accident. You should also keep in mind that the liquid within the EpiPen should be clear. If it is cloudy or discolored, you should properly dispose of it. Always keep your EpiPen out of extreme temperaturesâhot or cold.