A client suffers from migraine headaches and is ordered to receive sumatriptan succinate (Imitrex). The client asks why the medication works. The nurse explains that this medication:
a. dilates cerebral vessels to increase cerebral blood flow.
b. causes vasoconstriction to relieve migraine attacks.
c. increases blood flow and oxygen to the brain.
d. decreases blood pressure in order to decrease oxygen to the brain.
ANS: B
Migraines are caused by vasodilation and increased blood flow to the cerebral tissues. These medications decrease the blood flow and the symptoms of migraines.
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