Q: Why can peptides sometimes cause flushing, itching, or redness?, A: Because some peptides can turn that alarm up too fast., This can happen when:, The dose is high, The body absorbs it quickly, Two novel cases of delayed drug rash after immune checkpoint inhibitors and platin combination treatment Annals of Allergy, Asthma & Immunology What is Epinephrine? Allergy & Asthma Network Drug Allergy Program Allergy and Immunology Programs What causes a localized histamine reaction after a CJC (Growth Hormone Releasing Hormone) ipamorelin injection? Young man's allergic reaction goes from bad to worse!