The federal Food and Drug Administration put out a warning on March 1 about mixing protease inhibitors, used to treat HIV and hepatitis C, and certain types of the cholesterol-lowering drugs called statins.
The combination of the drugs can cause a form of muscle injury called myopathy, according to the FDA. The most serious form of myopathy, called rabdomyolosis, can lead to deadly kidney failure.
According to the FDA, labels for both the protease inhibitors and the affected statins are being updated to reflect the potential risk from interaction.
For more information on the drugs in question, go here: http://www.fda.gov/Drugs/DrugSafety/ucm293877.htm#data