AcelRx Pharmaceuticals, Inc. is a United States-based Pharmaceutical Company, which develops and commercializes therapies for the treatment of pain. The Company's products include ARX-01 Sufentanil NanoTab PCA System, to solve the problems associated with post-operative intravenous patient-controlled analgesia (IV PCA); ARX-02 Sufentanil NanoTab BTP Management System is a treatment option for cancer patients who suffer from breakthrough pain (BTP). ARX-03 Sufentanil/Triazolam NanoTab, provides non-invasive mild sedation, anxiety reduction and pain relief; and ARX-04 Sufentanil Acute Pain NanoTab, is a sublingual sufentanil product candidate designed to provide a non-invasive, fast-onset treatment of patients with moderate-to-severe acute pain, both on the battlefield and in civilian settings of trauma or injury.