Depends. What is the effect of the drug, and are you supposed to take it? If you know it is the wrong rx just return it and tell the manager or the people who perscribed it to you. Nobody wants to get in trouble with their parents, the police, or their health unless they do not care or are feeling down. But the appropriate thing to do is not take it and return it, because you could get in trouble. Do not throw it away or else you cannot get a refund. If you need your medicine or something that badly, then tell someone and get the problem fixed. And yes the people at the pharmacy could get into some serious trouble. The drug should be certified and checked before delivered and processed.
-Some random Guy-