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Answer: One or more of the following: A. It will taste bad, probably worse than it usually does B. It will not work as effectively C. Depending on what you kind of cough syrup you are taking, it could upset your stomach, potentially stomach cramps and diarahea D. You will have wasted your money.... If its expired more than a few months go buy a new.

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16y ago

What else can I help you with?