Paracetamol 500mg/650mg is a commonly used over-the-counter analgesic and antipyretic medication. It is primarily used to relieve mild to moderate pain, such as headaches, toothaches, menstrual pain, muscle aches, and to reduce fever associated with colds, flu, or other infections. Paracetamol works by inhibiting the production of prostaglandins in the brain, which are chemicals involved in pain and inflammation. It is typically taken orally in tablet or liquid form, with the recommended dosage depending on age, weight, and the severity of the symptoms. While generally considered safe when used as directed, overdose can lead to severe liver damage, so care should be taken not to exceed the recommended dose.