Pholedrine (‘Paredrinol Pulsotyl Veritol) also known as 4-hydroxy-N-methylamphetamine (4-HMA) 4-hydroxymethamphetamine and para-hydroxymethamphetamine is a drug that stimulates the sympathetic nervous system. It is administered as a topical eye drop form for the purpose of dilating the pupil and can be used to diagnose Horner’s syndrome.
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