Acetaminophen, a common pain reliever used in hundreds of over-the-counter and prescription medicines, blunts positive emotions, the findings showed."Rather than just being a pain reliever, acetaminophen can be seen as an all-purpose emotion reliever," said lead author Geoffrey Durso from the Ohio State University, US.

The photographs that the participants saw in the study ranged from the extremely unpleasant (crying, malnourished children) to the neutral (a cow in a field) to the very pleasant (young children playing with cats).Results showed that participants, who took acetaminophen rated all the photographs less extremely than did those who took the placebo.In other words, positive photos were not seen as positively under the influence of acetaminophen and negative photos were not seen as negatively.

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