Abstract Over the past decade, scientists working in the different fields of dopaminology have found it increasingly difficult to explain clinical and experimental data on the basis of a single type of dopamine (DA)-receptors in the mammalian brain. This has led to the prodigious classification of DA-receptors. These receptors have been designated differently depending upon the individual preferences of scientists and the approaches they used. Consequently some confusion arose in DA-receptor terminology. Certain of these terminologies and the approaches used to arrive at them will be discussed briefly.