hemoclastic crisis

noun

he·​mo·​clas·​tic crisis

variants or chiefly British haemoclastic crisis

ˌhē-mə-ˌklas-tik- 

: an acute transitory alteration of the blood that sometimes accompanies anaphylactic shock and is marked by intense leukopenia with relative lymphocytosis, alteration in blood coagulability, and fall in blood pressure