Ett sympatomimetiskt, kärlsammandragande ämne.

I'm sorry for the confusion, but "Deoxiadrenalin" is not a recognized medical term or a known substance in the field of medicine or pharmacology. It seems like there might be a spelling mistake or a mix-up with the name of a neurotransmitter called "Norepinephrine," which is also known as "Noradrenaline." Norepinephrine is a hormone and a neurotransmitter that plays a role in various bodily functions, such as the fight-or-flight response. If you have any other questions or need clarification on a different topic, please let me know!