How do painkillers kill bacteria?

Painkillers (analgesics) do not kill bacteria or viruses. They reduce the pain by:

* reducing swelling and other inflammation * interfering with the transmission of nerve impulses reporting the pain to the brain * interfering with the short term memory and the recollection of pain * reducing the awareness of pain Antibiotics kill bacteria. They contain ingredients that kill these microorganisms outright, weaken them, or affect their ability to grow and multiply until your body's own defenses can kill them.