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A member asked:
I just started taking propanolol for hyperthyroidism. it started giving me headaches and i felt really alert all day and night. why would this happen?
A doctor has provided 1 answer
Vasodilation: Propranolol cases your blood vessels to dilate (vasodilation). When this occurs in your brain it can cause headaches. If having hyperthyroidism caused you to feel drowsy or fatigued, you may now be experiencing alertness because the medication is treating the condition.
Answered 6/30/2014
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