Inhibition of substance P release from spinal cord tissue after pretreatment with capsaicin does not mediate the antinociceptive effect of capsaicin in adult mice

Abstract
Substance P (SP) is released from primary afferent fibers in response to nociceptive stimuli. Capsaicin, which produces an initial hyperalgesic response followed by persistent antinociception, also elicits release of SP from primary afferent fibers. Capsaicin pretreatment decreases the conte

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