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Cough and Cold
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Many prescription or over-the-counter drug combinations of two or more ingredients should not be used because they are irrational combinations of single ingredients, some of which are safe and effective and sensible to use alone if treating the symptom for which they are intended. The combinations, however, present extra risks for extra ingredients that will usually not add any benefit (possibly a risk) to the first ingredient and will invariably cost much more than the single ingredient alone.