phenoxy-

phenoxy-

prefix indicating the presence of a chemical group composed of phenyl and an atom of oxygen: phenoxycaffeine.
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A previously reported randomised trial [5] of 125 mg phenoxy- methylpenicillin (pen VK) or amoxicillin given three times a day for 10 days to children with GABHS pharyngitis demonstrated that the recurrence of the original GABHS within 21 days after the end of therapy was higher with pen VK (20%) than with amoxicillin (13%).