A specific receptor complex on a neuron's membrane has a primary binding site for a neurotransmitter that, when bound, opens a channel allowing negative ions to flow into the cell. This complex also has a separate, distinct binding site. A new drug is developed that binds only to this separate site. When this drug is bound, the channel opens more easily and for a longer duration in the presence of the primary neurotransmitter. What is the most likely overall effect of this new drug on the neuron?

A new experimental drug is found to bind to a receptor complex on a neuron's membrane. This binding action opens an integrated channel, allowing a significant influx of negatively charged chloride ions (Cl-) into the cell. Based on this specific mechanism, what is the most likely effect of this drug on the neuron's activity?