Paracetamol and ibuprofen are different types of painkillers, so taking them together does not double up on the same drug and is a common approach for stronger pain or fever relief. Many people take them at the same time, while others stagger or alternate the doses so something is always working. Always follow the dosing directions on each product's label and never exceed the stated maximum for either medicine in 24 hours.
Ibuprofen is a non-steroidal anti-inflammatory (NSAID) and is harder on the stomach and kidneys, so take it with food and use caution if you have stomach ulcers, kidney disease, heart failure, asthma, or are pregnant. Paracetamol is processed by the liver, so be careful not to take it alongside combination cold or flu products that also contain paracetamol.
If pain or fever is severe, lasts more than a few days, or is not controlled by these medicines, speak to a doctor or pharmacist. Seek urgent care for a high fever with a stiff neck, rash that does not fade, confusion, difficulty breathing, or severe abdominal pain.