'Acetaminophen (such as Tylenol®) is the most commonly used analgesic medication worldwide. Many physicians and lay people assume that acetaminophen is perfectly safe. It is not.
A recent study published in the British Medical Journal (March 1, 2015) highlighted some of the adverse effects of acetaminophen.
The researchers looked at multiple trials that reported adverse events related to acetaminophen use including mortality as well as cardiovascular, gastrointestinal or kidney problems. In one study, the authors found a 90% increased risk in overall mortality in those taking acetaminophen.'