Hi, welcome to the forum, Epipen delivers a measured dose of
epinephrine (also known as adrenaline) using autoinjector technology, most frequently
for the treatment of acute allergic reactions to avoid or treat the onset of anaphylactic shock. In certain cases it can be used to stop local bleeding.
Epinephrine is known to act on the uterus through beta 2 receptors and can cause relaxation of the uterus. At term, it can prevent the contraction and delay the labor.