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Whatever the answer to your question, snris work on both serotonin and norepinephrine receptors, so if the snri relieved your anxiety it's very unlikely norepinephrine is causing your anxiety -- by taking the snri you just increased the functioning of it and you reduced your anxiety.
Norepinephrine. In addition to epinephrine, we see norepinephrine, which is a second hormone secreted by the adrenal medulla that increases heart rate, blood pressure, cardiac output and blood glucose levels.So we see that norepinephrine is very similar to epinephrine.t the center of the adrenal glands we see the adrenal medulla. This portion of the gland is stimulated by the sympathetic nervous system to secrete catecholamines, which are hormones that help you deal with short-term stress. There are two catecholamines. One is called epinephrine or adrenaline.