Established and putative neurotransmitters in the enteric nervous system
| *Neurotransmitter status established. |
| †Probable neurotransmitter. |
| Amines |
| Acetylcholine * |
| Noradrenaline* |
| 5-hydroxytryptamine (5-HT) |
| Amino acid |
| γ aminobutryic acid (GABA)* |
| Purine |
| ATP |
| Gases |
| Nitric oxide (NO)* |
| Carbon monoxide |
| Peptides |
| Calcitonin gene related peptide (CGRP)† |
| Cholecystokinin (CCK) |
| Gastrin releasing peptide (GRP) |
| Neuropeptide Y (NPY)† |
| Neurotensin |
| Opioids |
| Peptide YY (PYY) |
| Pituitary adenylyl cyclase activating peptide (PACAP) |
| Somatostatin |
| Substance P* |
| Vasoactive intestinal polypeptide (VIP)* |