The perceived intensity of a stimulus may be magnified during depression. Stimulus intensity control can be studied by means of cortical evoked potentials. In a study of 33 depressives, cortical evoked potentials were greater during depression than on recovery. The effect of doxepin on the amplitudes of evoked potentials of depressives was compared with that of amitriptyline. Doxepin reduced amplitudes. Amitriptyline had a similar, but non-significant effect.
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