How histamine causes anxiety symptoms (or GAD)
Histamine is….a hydrophilic vasoactive amine. (Wikipedia) A vasoactive is a pharmaceutical agent that has the effect of either increasing or decreasing blood pressure and/or heart rate. (Wikipedia)This means that histamine can affect your heart rate. Fluctuations in heart rate can cause feelings of anxiety and palpitations. I spent years thinking that my palpitations were caused by anxiety. I still get them if I eat chocolate!