Test Control: Histamine is used as a control on allergy tests. Meaning we expect you to have a reaction to histamine because that's the chemical that causes the symptoms seen on the skin in an allergic reaction and the presence of a reaction to it means your immune system is working properly by reacting to this chemical in the way we would expect it to. It makes your allergy test results valid.
Answered 7/6/2014
3.9k views
3 doctors weighed in across 2 answers
5 doctors weighed in across 2 answers
A doctor has provided 1 answer
4 doctors weighed in across 2 answers
4 doctors weighed in across 2 answers
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question