Subjects taking acetaminophen reacted less strongly to both pleasant and unpleasant photos . Each week , 52 million Americans use the pain reliever . The study was conducted by researchers at Johns Hopkins University School of Medicine in Baltimore, Maryland.
Subjects taking acetaminophen reacted less strongly to both pleasant and unpleasant photos . Each week , 52 million Americans use the pain reliever . Unknown whether other pain products produce the same effect .