CAMBRIDGE, Mass. -- Many consumers probably don't know the difference between phenylpropanoloamine (PPA) and pseudoephedrine, but kids will be able to taste the difference, according to a study released last week by consulting firm Arthur D. Little here. several cold remedies after the Food & Drug Administration last year recommended that products containing PPA no longer be marketed. Pseudoephedrine, however, has a much more bitter flavor, according to Arthur D. Little, and that could ...

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