The same brand names are sometimes used for different drugs in different countries, posing a risk for people who import cheaper medicines from abroad, a U.S. group warned on Thursday. The nonprofit Institute for Safe Medication Practices said it identified at least seven medicines sold in European countries with different ingredients than the ones with the same brand names in the United States.No mix-ups from imported drugs have been reported but it is a potential danger, said Matthew Grissinger, a medication safety analyst for the group, which alerts doctors and pharmacists to potential drug name confusion.