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ANALGesics

  • PAIN- IS A SUBJECTIVE EXPERIENCE WHICH CAN NOT BE OBJECTIVELY DEFINED OR QUANTIFIED SATISFACTORILY.
  • ALGESIA (pain) is an ill-defined, unpleasant sensation, usually evoked by an external or internal noxious stimulus.
  • Classification-
  • Supeficial/ cutaneous pain.
  • Deep non-visceral pain
  • Visceral pain
  • Reffered pain
  • Psychogenic or functional pain
  • The word opiates refers to the products from the opium poppy.
  • The term opioid (opoiate – like) is used to denote all naturally occurring, semi synthetic and synthetic drugs which have a morphine like action viz relief from pain and depression of the CNS, both of which are reversed by naloxone.
  • These drug formerly called ‘narcotic’ analgesics because some of them induce sleep. The word ‘narcotic’ is derived from the greek prefix ‘Narco’ which means to deaden.
  • Opioids are capable of producing drug dependencies.

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