Highlights
5HT-evoked nocifensive behaviors are sexually dimorphic and dependent on hormone status of the animal.
Blocking the excitatory 5HT
2A
receptor attenuates 5HT-evoked pain behaviors in females during proestrus/estrus.
Basal levels of 5HT are elevated in cycling females as compared to males.
Estrogen potentiates serotonergic neuromodulation of capsaicin-evoked CGRP release in female trigeminal sensory neurons.
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