Morphine is a potent opioid analgesic that acts on the central nervous system (CNS) to reduce severe pain by binding to opioid receptors in the brain and spinal cord. It mimics the body’s natural pain-relieving endorphins, interrupting pain signals and reducing anxiety associated with discomfort. [1, 2, 3, 4]
Mechanism of Action
- Receptor Binding: Morphine primarily binds to \(\mu \)-opioid receptors, activating a G protein cascade that mimics natural endorphins to block pain messages.
- CNS Depression: It alters how the brain and nervous system perceive pain, often inducing drowsiness, relaxation, and euphoria.
- Body System Effects: It slows down the central nervous system, leading to decreased pain, slow or shallow breathing, and decreased motility in the gastrointestinal tract (causing constipation).
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