Final answer:
Epinephrine is the medication that is absorbed systemically after pulmonary administration and is used particularly in emergency situations such as anaphylactic reactions.
Step-by-step explanation:
The medication that has been shown to be absorbed systemically after pulmonary administration is epinephrine. Epinephrine, also known as adrenaline, is released into the bloodstream by the adrenal gland and plays a critical role in the body's fight-or-flight response to stress. When administered via inhalation, epinephrine can have systemic effects, as it is rapidly absorbed through the lung tissue into the circulation. This rapid absorption makes inhaled epinephrine useful in situations like anaphylactic reactions, where the drug needs to act quickly to counteract severe allergic responses.
As for other options:
Norepinephrine and dopamine are also catecholamines like epinephrine, but they are less likely to be used for pulmonary administration. Vasopressin and phenylephrine have different pharmacologic properties and are not typically absorbed systemically in the same manner as epinephrine when administered via the pulmonary route.