Paracetamol is a safe medicine if you take it correctly. However, if you take too much it can cause serious damage to your liver and kidneys, which can be fatal. Taking too much paracetamol can cause serious damage to your liver and kidneys, which can be fatal. This can be easily done without realising. Many different products that you can buy contain paracetamol, such as dissolvable cold and flu medicines. You need to be careful to include all products you have taken when working out how much paracetamol you have had. Always read the patient information leaflet that comes with your medicine and ask your pharmacist if you have any questions.