My son who is 16 just had his 3rd Entyvio infusion. After the first infusion his only complaint was moderate back pain like between his shoulder blades. After the second infusion it was back pain in the same spot and a bad headache like a migraine. Now it is 4 days after his 3rd infusion and, Hi everyone, It has been a long time since I've been on (long story!!). I have been on Entyvio since it was approved so about a year now. I have had some odd side effects with this med (lol like I do with most meds) but my most concerning right now is hair loss and scalp itching. When I started, A forum to discuss all aspects of Entyvio, an integrin receptor antagonist. Integrin receptors are proteins expressed on the surface of certain cells. Integrin receptors function as bridges for cell-cell interactions. Entyvio blocks the interaction of a specific integrin receptor (expressed on, It is important to call the Entyvio Connect hotline 855 489 6814 to report symptoms and side effects. Just don't expect anything support, information or help from whoever you speak with., The only real side effect I've noticed until recently with Entyvio is a dull headache. However, just recently, I've noticed my skin becoming more sensitive and itching. It seems there are some blister-like spots. Then I scratch and end up with scabs. I have them on the backs of both hands, The side effects look pretty typical: "Common side effects include common cold, headache, joint pain, nausea, fever, infections of the nose and throat, tiredness, cough, bronchitis, flu, back pain, rash, itching, sinus infection, throat pain, and pain in extremities." Nothing too horrible-sounding, and hopefully they don't occur often..