I sjældne tilfælde kan humant normalt immunglobulin fremkalde blodtryksfald med anafylaktisk reaktion, selv hos patienter, som hidtil har tålt behandling med humant normalt immunglobulin.
Rarely, human normal immunoglobulin can induce a fall in blood pressure with anaphylactic reaction, even in patients who had tolerated previous treatment with human normal immunoglobulin.