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Old 02-02-2019
sohag100 sohag100 is offline
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Default Repeated USMLE Questions Step 1-545

A 23-year-old woman presents to her physician with ptosis, meiosis and anhidrosis in the left eye.
Which one of the following drugs is used to determine whether this lesion is preganglionic or postganglionic?
A-Albuterol
B-Atenolol
C-Cocaine
D-Epinephrine
E-Phenylephrine
Answer
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