There has been a recall of certain lots of infants ibuprofen drops, these lots were sold at Walmart, CVS, and Family Dollar. These lots may have had up to 10% more ibuprofen in them than is listed. This should not cause any ill effects, but you should discard any you may have remaining.
To see if you have one of the lots that was affected, check the chart on the company website here. If you have one of these lots, you should discard what you have remaining and buy a new package (checking with the store first to be sure they have discarded their recalled lots, which all of them should have by now). If you have any further questions, you may call the office.