How do morphine and other opioid pain medications relieve a patient's pain?
a. They reduce tissue damage and alter the physical problems causing the pain.
b. They bind to opioid receptors in the central nervous system and alter the percep-tion of pain.
c. They inhibit the generation of impulses along sensory nerve tracts and alter pain transmission.
d. They redirect substance P release from nociceptors and alter the amount of neu-rotransmitters reaching the brain.
B
Morphine and other opioid agonists do nothing to change the cause or transmission of pain. They bind to naturally occurring opioid receptor sites and alter a patient's perception of the painful experience.
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1. MAOIs 2. SSRIs 3. Beta blockers 4. Benzodiazepines