Review I discovered histaminum years ago in a health store synchronistically. I had horrific hives that meds would not help. Eventually it turned out I was allergic to a medication. Lately, I have been sneezing often and it has helped that dramatically. My asthma became better with using it and I researched on line and found that it can help asthma. I have been using homeopathy for over 3 decades and keep finding more wonderful uses. In the season of Thanksgiving I am very grateful for homeopathy.