“However, melatonin (30-3000 microM) reversibly decreased the amplitude of nicotinic excitatory postynaptic potentials (EPSPs) in a concentration-dependent manner (IC50 = 247 microM).”
“In voltage-clamp experiments, using the whole-cell configuration, melatonin also inhibited the nicotinic inward currents induced by acetylcholine (IACh) in a concentration-dependent manner (IC50 = 257 microM).”