My allergist gave me a pin-prick test on my forearms recently testing me for various allergies. After the test knowing I had a one hour drive home he had me drink a red liquid which would help me with itching and also to help me from any reactions to some of the testing. I can t recall what the name of the liquid was but I think it started with the letter B. I was looking up the medicines under the letter B when I thought I might ask...