Tylenol, generically named acetaminophen, is a common over-the-counter medication used to lower fevers and treat all sorts of body pain. For example, it can treat the pain from toothaches, headaches and arthritis, according to Drugs.com. Before taking Tylenol, inform your doctor about your history of liver disease or alcoholism because she will check whether Tylenol is safe for you to use.
Liver Damage
Taking too much Tylenol can lead to liver damage. According to Drugs.com, 4,000 mg per day is Tylenol's maximum dosage. Signs of liver damage include nausea, vomiting, stomach pains and elevated liver enzymes (natural chemicals produced in your liver) called alanine aminotransferase (ALT) and aspartate aminotransferase (AST).
Uncommon Side Effects
Sometimes Tylenol may cause such uncommon side effects as lower back pain, skin rash, hives, a new fever (unrelated to your current condition), decreased urination or abnormal bleeding and bruising, according to the Mayo Clinic. Tylenol can also affect your stools and cause them to be bloody or black. Fatigue and bloody urine are other uncommon side effects of Tylenol.
Emergent Side Effects
Tylenol can also cause decreased appetite, low fever, nausea, dark urine and yellowing of your skin or eyes, warns Drugs.com. In some cases, Tylenol can cause hives, difficulty breathing and swelling of your lips, face or throat. These emergent side effects require immediate medical care.
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