Get emergency medical help if you have any of these signs of an allergic reaction to paracetamol: hives; difficulty breathing; swelling of your face, lips, tongue, or throat. Stop using this medication and call your doctor at once if you have a serious side effect such as:
low fever with nausea, stomach pain, and loss of appetite;
dark urine, clay-colored stools; or
jaundice (yellowing of the skin or eyes).
This is not a complete list of paracetamol side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
 Paracetamol side effects (more detail)
