In medicine|lang=en terms the difference between ureidopenicillin and piperacillin
is that ureidopenicillin is (medicine) any of a class of penicillin antibiotics in which an amino group has been replaced by a urea moiety while piperacillin is (medicine) a particular ureidopenicillin antibiotic.
As nouns the difference between ureidopenicillin and piperacillin
is that ureidopenicillin is (medicine) any of a class of penicillin antibiotics in which an amino group has been replaced by a urea moiety while piperacillin is (medicine) a particular ureidopenicillin antibiotic.