The term "containing analgesic medicines" refers to products that contain pain-relieving drugs. There are various words that can be used as synonyms for this term, such as painkillers, analgesics, pain relievers, anodynes and so on. These drugs work by blocking the nociceptors that transmit pain signals to the brain, therefore reducing or eliminating the sensation of pain. Commonly used analgesics include acetaminophen, aspirin, ibuprofen and naproxen. There are also prescription analgesics, such as opioids, which are used to manage severe pain. Products that contain analgesic medicines are widely used to treat various types of pain, such as headache, toothache, menstrual cramps, back pain, arthritis, and other conditions that cause discomfort.