Allergist & Immunologist Questions Allergist-Immunologist

Hives & itchiness following a Moderna booster shot?

My husband got his Moderna booster shot last Thursday. He has been feeling unwell for the past 4 days. His arm is red and the redness is growing larger. It is extremely itchy. Should he take an antihistamine remedy?


3 Answers

Yes, that help until his reaction subsides. At 4 days, I would think him about at the end of his reaction.

G. Dickinson
See a physician ASAP. No over the phone Dx or Rx or PA/ NP. You need an in-person visit, not telemedicine. ER if needed.

Carl Lauter, MD, MACP, FAAAAI, FIDSA
Vaccinations can occasionally cause "large localized reactions" with redness and itching. A long acting antihistamine can help relieve these temporary symptoms. If he develops worsening swelling and/or fever, he should be seen by his primary doctor.