Analgesics, also known as painkillers, are medications used to treat and relieve pain in the body. They're usually used when the pain is unbearable and the patient can't take it any longer. The most commonly used topical analgesics worldwide are non-opioids, opioids, and compound analgesics (a combination of opioids and non-opioids). The rise in acute and chronic illnesses, as well as the...