Final answer:
The neurotransmitter in the medication is epinephrine.
Step-by-step explanation:
The neurotransmitter in the medication that your friend needs to take is epinephrine (option B). Epinephrine is released from the adrenal medulla, which is the interior portion of the adrenal gland. It acts as a hormone when released into the bloodstream and can cause physiological responses such as increased heart rate and dilation of airways. In this case, epinephrine would help alleviate the tingling sensation in your friend's throat by constricting blood vessels and reducing inflammation.