An analgesic (colloquially known as painkillers) is any member of the diverse group of drugs used to relieve pain and to achieve analgesia.
See also:
This derives from Greek an-, "without", and -algia, "pain".
Analgesic drugs act in various ways on the peripheral and central nervous system; they include paracetamol (acetaminophen), the nonsteroidal anti-inflammatory drugs (NSAIDs) such as the salicylates, narcotic drugs such as morphine, synthetic drugs with narcotic properties such as tramadol, and various others..
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