Dixit, S., et al. A case of SSRI induced irreversible Parkinsonism. 2015. J Clin Diag Res. 9(2):VD01-VD02.
Summary- the subject abruptly discontinued SSRI (fluxetine/sertraline) and developed Parkinson's symptoms. Symptoms were relieved with synthetic dopamine treatment (syncope); after discontinuation of treatment, symptoms returned.
Its not exactly new information, but this study is further evidence of the role of dopamine disregulation in PSSD. This case was particularly severe and the paper suggests that he may have had pre-existing Parkinsons.