Neurotransmitter for pain is
Substance P a polypeptide neurotransmitter that stimulates vasodilation and contraction of intestinal and other smooth muscles. It also plays a pa in salivary secretion, diuresis, natriuresis, and pain sensation. It has been isolated from ceain cells of the GI and biliary tracts.Ref: Ganong&;s review of medical physiology 23rd edition Page no: 143
Dopamine
Substance P
PAF
None
General physiology