Ipamorelin Side Effects: What to Expect Nulevel Wellness Medspa Peptide injections can sometimes cause redness or itching at the injection site, but most of the time this is not a true allergy. In the skin, we have mast cells that contain Has anyone had these kind of reactions from cjc&ipa?! : r Peptides Drug Allergy Mimics The Journal of Allergy and Clinical Immunology: In Practice How Hormones Can Affect Your Allergies Dr. Shel Wellness & Aesthetic Center What causes a localized histamine reaction after a CJC (Growth Hormone Releasing Hormone) ipamorelin injection?