2 doctors weighed in:
How do vasodilators work in patients with allergic reactions?
2 doctors weighed in

Dr. Jeffrey Rumbyrt
Internal Medicine - Allergy & Immunology
1 doctor agrees
In brief: They generally don't
In allergic reactions, the blood vessels actually dilate.
This is what causes the swelling often seen in allergic reactions. On the other hand, decongestant agents are used to treat allergic reactions; their mechanism of action is to constrict the blood vessel and decrease local swelling.

In brief: They generally don't
In allergic reactions, the blood vessels actually dilate.
This is what causes the swelling often seen in allergic reactions. On the other hand, decongestant agents are used to treat allergic reactions; their mechanism of action is to constrict the blood vessel and decrease local swelling.
Dr. Jeffrey Rumbyrt
Dr. Jeffrey Rumbyrt
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