Hello, @mimi7. Sorry to hear you also are going through hives and dermatographia from the Moderna booster. I received my booster October 25, 2021. This is month 5 for me with dermatographia. I do not find relief with over the counter antihistamines. In February 2022 I began Xolair, a biologic injection. The first dose relieved the intense itch of my scalp. The second dose provided more relief. I am schedule for a third dose the end of April. My dermatographia is not gone, but it takes a lot more pressure or a deeper scratch to cause my skin to inflame. I hope you can find a combination that works for you.

Hi - I would like to add that for me personally taking Claritin 1x daily did the trick to eliminate itching and subsequent dermatographism. I weaned myself to once every other and then once every two days. I did this over a month period and finally got off it completely. It took about 7-9 days for any itching to reappear and 10 days for the severe itching and subsequent dermatographism to reappear. I have been dealing with this since the new year after getting the booster end of December ‘21.