| Recruiting | Natural History of Depression, Bipolar Disorder and Suicide Risk NCT06462196 | National Institute of Mental Health (NIMH) | — |
| Completed | U/S Guided Rhomboid Intercostal Block Combined With Sub-Serratus Plane Block vs Type 2 Pectoral Nerve Block NCT06274814 | National Cancer Institute, Egypt | N/A |
| Enrolling By Invitation | Comparison of 2 Different Methods in Infraclavicular Block NCT06402149 | Ankara City Hospital Bilkent | — |
| Unknown | Opioid Sparing Anesthesia in Cervical Spine Surgery NCT05717361 | Evangelismos Hospital | N/A |
| Unknown | Opioid Sparing Anesthesia in Lumbar Spine Surgery NCT05594407 | Aretaieion University Hospital | N/A |
| Unknown | Opioid-free Anesthesia in Thyroidectomies NCT05243940 | Aretaieion University Hospital | N/A |
| Withdrawn | Rescue Quadratus Lumborum Blocks for Post-cesarean Pain NCT04397458 | The University of Texas Health Science Center, Houston | Phase 4 |
| Unknown | Opioid-free Anesthesia in Laparoscopic Cholecystectomies NCT05089526 | Aretaieion University Hospital | N/A |
| Completed | Drug-drug Interaction Study of Lemborexant as an Adjunctive Treatment for Buprenorphine/Naloxone for Opioid Us NCT04818086 | Virginia Commonwealth University | Phase 1 / Phase 2 |
| Completed | Pregabalin vs. Gabapentin on Reducing Opioid Usage NCT04705480 | CAMC Health System | Phase 4 |
| Unknown | Opioid-free Anesthesia With a Mixture of Dexmedetomidine-lidocaine-ketamine NCT04858711 | Aretaieion University Hospital | N/A |
| Unknown | EFFECT - EFFectiveness of ESPB (Erector Spinae Plane Block) in Laparoscopic Cοlectomies Trial NCT04879004 | Democritus University of Thrace | N/A |
| Unknown | Lidocaine and Magnesium and Ketamine in Gynecological Surgery NCT04622904 | Aretaieion University Hospital | N/A |
| Terminated | Natural Killer Cell (CYNK-001) IV Infusion or IT Administration in Adults With Recurrent GBM NCT04489420 | Celularity Incorporated | Phase 1 |
| Completed | Addition of Buprenorphine to Paracervical Block for Pain Control During Osmotic Dilator Insertion NCT04254081 | University of California, San Diego | Phase 4 |
| Unknown | Natural Killer Cell (CYNK-001) Infusions in Adults With COVID-19 NCT04365101 | Celularity Incorporated | Phase 1 / Phase 2 |
| Unknown | Natural Killer Cell (CYNK-001) Infusions in Adults With Multiple Myeloma NCT04309084 | Celularity Incorporated | Phase 1 |
| Completed | Post-cesarean Analgesia With Epidural Morphine Following Epidural 2-chloroprocaine NCT04369950 | The University of Texas Health Science Center, Houston | Phase 4 |
| Terminated | Natural Killer Cell (CYNK-001) Infusions in Adults with AML NCT04310592 | Celularity Incorporated | Phase 1 |
| Recruiting | Cognitive Outcomes After Dexmedetomidine Sedation in Cardiac Surgery Patients NCT04289142 | Sunnybrook Health Sciences Centre | Phase 4 |
| Completed | Analgesia in ÖAMTC Helicopter Emergency Service in Austria NCT03760302 | Medical University Innsbruck | — |
| Completed | Intraoperative Nociception and Postoperative Pain NCT03761433 | Samsung Medical Center | — |
| Completed | Validation of Pupillary Response to Nociceptive Stimulation in Cardiac Surgery During Extracorporeal Circulati NCT03568396 | University Hospital, Tours | — |
| Completed | The Prediction for Postoperative Pain NCT03585088 | Samsung Medical Center | N/A |
| Unknown | Acceptable Hemodynamic Changes in Dexmedetomidine for Single Intravenous Bolus Injection NCT03655847 | Second Affiliated Hospital of Wenzhou Medical University | Phase 4 |
| Completed | Efficacy of Opioid-free Anesthesia in Reducing Postoperative Respiratory Depression in Children Undergoing Ton NCT02987985 | University of Saskatchewan | Phase 3 |
| Completed | Monitoring Side Effects Of Pain Medication Prescribing By Emergency Department In Patients Over 65 NCT02046681 | Azienda Ospedaliera S. Maria della Misericordia | — |
| Completed | The Effect of Intraoperative Ketamine on Opioid Consumption and Pain After Spine Surgery in Opioid-dependent P NCT02085577 | Rigshospitalet, Denmark | Phase 4 |
| Completed | Mentholated Cream Containing Oxygenated Glycerol Triesters on Acute Pain of the Muscles and Joints NCT01387750 | NEMA Research, Inc. | Phase 1 / Phase 2 |
| Completed | A Safety Trial to Compare Different Analgesics in Combination With Low Dose Aspirin to Study Their Bleeding Pr NCT00261586 | Johnson & Johnson Consumer and Personal Products Worldwide | Phase 4 |
| Completed | A Repeated-Dose Evaluation of a Pain Relieving Drug Use and Safety of OROS Hydromorphone HCI in Patients With NCT00410644 | Alza Corporation, DE, USA | Phase 3 |