What mimics Norepinephrine?

Substances that mimic norepinephrine include certain neurotransmitters and hormones, primarily epinephrine (adrenaline) and dopamine, which can activate similar adrenergic receptors in the body. Drugs known as sympathomimetics, such as amphetamines and certain cold medications, can also produce effects similar to norepinephrine by stimulating the sympathetic nervous system. Additionally, some herbal supplements like ma huang contain ephedrine, which has norepinephrine-like effects.