Alpha-adrenergic receptors are a type of G protein-coupled receptor that bind norepinephrine and epinephrine, leading to various physiological responses such as vasoconstriction, increased blood pressure, and smooth muscle contraction.
Fenylefrin
En alfaadrenerg agonist (alfastimulerare) som används som pupillvidgande, nässlemhinneavsvällande och hjärtstimulerande medel.