Michigan is among 30 other states to have reached an $8 million dollar settlement with drug maker Bayer.
The case involved allegations that the drug maker failed to adequately warn consumers about risks associated with a cholesterol-reducing drug.
Pennsylvania's attorney general says Bayer learned after introducing Baycol in 1998 that the drug posed significantly greater health risks than other similar drugs.
Officials say risks were particularly more serious when the drug is taken in higher doses or in combination with another cholesterol-lowering drug. The case was settled in Pittsburgh.
Bayer has not admitted any wrongdoing, but has agreed to register results from clinical trials and studies online.