The term "false neurotransmitter" does not correspond to a widely recognized or established concept in standard neuroscience, neuropharmacology, or physiology literature. There are no authoritative encyclopedic sources that define or describe a category known as "false neurotransmitters" within the formal taxonomy of neurotransmission.
It is possible that the term may be a misstatement or confusion with the concept of "false neurotransmitters" in a narrow, outdated, or non-standard context—such as substances that mimic neurotransmitters in function but are not naturally occurring or physiologically typical. In some older pharmacological discussions, certain amphetamine-derived compounds or synthetic analogs have been referred to informally as "false transmitters" because they are taken up into synaptic vesicles and released like neurotransmitters (e.g., dopamine or norepinephrine) but elicit aberrant or diminished postsynaptic responses. However, this usage is specialized, historical, and not commonly found in current scientific discourse or encyclopedic references.
Due to the lack of standardized usage and absence from mainstream scientific databases and textbooks, "false neurotransmitter" cannot be confirmed as a valid technical term in modern neuroscience.