This tremor got worse with the cessation of tetrabenazine and was associated with other MD such as chorea, dystonia, stereotypy, etc. However, these cases were reported before the FDA approval of DaT scan (dopamine transporter scan) and it is possible that tardive tremor could represent an underlying dystonia leading to tremor because some cases reported improvement with a sensory trick [7]. This evidence concerns the gene SLC6A3 and Tremor.