| Not Yet Recruiting | Fentanyl Versus Opioid Free Multimodal Analgesia for Perioperative Pain Control in Children With Mild to Moder NCT07435493 | Ain Shams University | N/A |
| Not Yet Recruiting | Comparing Outpatient Treatment Retention Among Individuals Using Fentanyl Randomized to Low-dose and Direct-to NCT07469501 | University of California, San Francisco | Phase 4 |
| Recruiting | Ketamine-lidocaine Versus Ketamine-fentanyl for Induction of Anesthesia in Patients With Left Ventricular Syst NCT07248202 | Cairo University | N/A |
| Recruiting | Intrathecal Dexmedetomidine-Fentanyl Combination Versus Fentanyl Alone as Adjuvant to Bupivacaine in Spinal An NCT07276867 | National Cancer Institute, Egypt | N/A |
| Not Yet Recruiting | Fentanyl Intranasal for Retinopathy of Prematurity Screening in Preterm Infants NCT07112430 | IWK Health Centre | Phase 1 / Phase 2 |
| Not Yet Recruiting | D-FAB-POUR Trial: Dexmedetomidine vs Fentanyl as Adjuvants to Bupivacaine on Postoperative Urinary Retention NCT07117565 | Tribhuvan University Teaching Hospital, Institute Of Medicine. | Phase 4 |
| Not Yet Recruiting | Comparison of Caudal Block Combined With General Anesthesia and Penile Block and Intravenous Fentanyl in Pedia NCT06862271 | Miray Gözde Özdemir | N/A |
| Completed | Premixed, Sequential and Manually Mixed Administration of Intrathecal Fentanyl and Bupivacaine in Cesarean Sec NCT06820203 | Tanta University | N/A |
| Not Yet Recruiting | Comparative Study Between Intrathecal Magnesium Sulfate, Neostigmine and Fentanyl as Adjuvant for Bubivacaine NCT06685705 | Assiut University | Phase 4 |
| Recruiting | Fentanyl Versus Ketorolac as an Adjuvant to Peribulbar Block for Anterior Segment Surgeries NCT07141589 | Cairo University | N/A |
| Completed | Fentanyl and Dexmedetomidine as Adjuvants to Bupivacaine in Ultrasound-guided Superficial Cervical Plexus Bloc NCT07057739 | Kafrelsheikh University | N/A |
| Recruiting | Evaluating Tetrahydrocannabinol as an Adjunct to Opioid Agonist Therapy NCT05985850 | BC Centre on Substance Use | Phase 2 |
| Completed | Opioid-based Versus Opioid-free Endotracheal Intubation NCT06464393 | Aretaieion University Hospital | N/A |
| Completed | Propofol-Fentanyl-Dexmedetomidine and Propofol-Fentanyl-Sevoflurane Anesthesia for Major Spine Surgery Under S NCT06210061 | Ain Shams University | N/A |
| Recruiting | Fentanyl or Esketamine for Traumatic PAIN (FORE-PAIN) Trial NCT06051227 | Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA) | Phase 3 |
| Completed | Hemodynamic Effects of Bolus of Ketamine Versus Fentanyl in Patients With Septic Shock NCT05957302 | Cairo University | N/A |
| Recruiting | Fentanyl Versus Dexmedetomidine as an Adjuvant to Bupivacaine in Spinal Anesthesia ; Peritoneal Symptomatic Ef NCT06386783 | Aswan University | Phase 3 |
| Completed | Lidocaine Versus Fentanyl for Hemodynamic Stability NCT06557473 | Theodor Bilharz Research Institute | Phase 4 |
| Completed | Analgesic and Sedative Effect of Fentanyl Versus Dexmedetomidine Infusion in Post-Operative Mechanically Venti NCT06994273 | Tanta University | N/A |
| Unknown | Pharmacogenetics Analysis of Fentanyl Administered in Newborns NCT05805241 | IRCCS Burlo Garofolo | — |
| Terminated | Platelet Reactivity With Fentanyl, Morphine, or no Narcotic NCT05367336 | Corewell Health South | Phase 2 |
| Unknown | Opioid-free Anesthesia in Thyroidectomies NCT05243940 | Aretaieion University Hospital | N/A |
| Completed | Esketamine Sedation and Fentanyl Sedation in Pediatric Dental Patients NCT04597320 | Peking University | Phase 4 |
| Unknown | Effect of Topically Administered Levobupivacaine- Fentanyl Versus Levobupivacaine- Dexamethasone Combination i NCT05145543 | Assiut University | Phase 2 / Phase 3 |
| Completed | Dexmedetomidine vs Fentanyl on Time to Extubation in Patients Undergoing Laparoscopic Sleeve Gastrectomy NCT06052111 | Helwan University | N/A |
| Completed | Dexmedetomidine or Fentanyl as Additives to Epidural Levobupivacaine in Painless Labor NCT04397406 | Tanta University | Phase 4 |
| Withdrawn | A RCT of a Combination of Analgesics for Pain Management in Children With a Suspected Fracture NCT02985177 | St. Justine's Hospital | Phase 4 |
| Terminated | Slow-Release Oral Morphine for the Treatment of Opioid Use Disorder NCT03948464 | M. Eugenia Socias | Phase 3 |
| Completed | Dexmedetomidine to Levobupivacaine for Transversus Abdominis Plane Block in Elderly Patients Undergoing Inguin NCT04971759 | Assiut University | Phase 2 / Phase 3 |
| Unknown | Impact of CYP3A4*1G Polymorphism on Non-analgesic Effects of Fentanyl in Chinese Han Patients NCT03869346 | Peking University People's Hospital | — |
| Completed | Comparison of Sufentanil, Fentanyl and Remifentanil in Combination With Midazolam During Bronchoscopy Under Co NCT03901716 | Guangzhou Institute of Respiratory Disease | Phase 4 |
| Completed | Comparison of Efficacy of Anesthesia Administered by Endoscopist or Anesthesiologist on Colonoscopy NCT03607110 | Selda KAYAALTI | — |
| Completed | Spinal Anesthesia Associated With General Anesthesia in Coronary Artery Bypass NCT02840006 | Daniel Gioielli de Castilho | Phase 4 |
| Completed | Remifentanil vs Fentanyl During Cardiac Surgery and Chronic Thoracic Pain NCT02031016 | St. Antonius Hospital | Phase 4 |
| Withdrawn | Intrapartum Epidural Fentanyl and Breast-feeding in the Immediate Postpartum Period: a Prospective Cohort Stud NCT01488149 | University Hospitals Cleveland Medical Center | — |
| Unknown | Intraoperative Fentanyl Dose on Respiratory Complications NCT03198208 | Massachusetts General Hospital | — |