Retrophin, which is developing treatments for postpartum milk let-down, Schizophrenia and Autism, filed on Wednesday with the SEC to raise up to $40 million in an initial public offering. The New York, NY-based company, which was founded in 2008, plans to list on the NASDAQ under the symbol RTRX. The company is currently traded on the OTCQB under the same ticker. Bookrunners and pricing terms were not disclosed in the preliminary prospectus.