AcelRx Pharmaceuticals, Inc., is a specialty pharmaceutical company focused on the development and commercialization of therapies for the treatment of pain. The Company product candidates comprises: ARX-01 or the Sufentanil NanoTab PCA System; ARX-02 or the Sufentanil NanoTab BTP Management System; and ARX-03 or the Sufentanil/Triazolam NanoTab which are in their development stage. Its product ARX-01 is focused on acute post-operative pain, ARX-02 is focused on the treatment of cancer breakthrough pain and ARX-03 is focused on providing mild sedation, anxiety reduction, and pain relief to patients undergoing painful procedures in a physician's office. AcelRx Pharmaceuticals, Inc. is headquartered in Redwood City, California.