{"id":"occipital-nerve-block","brandName":"Occipital Nerve Block","genericName":"Occipital Nerve Block","companyId":"university-of-alabama-at-birmingham","companyName":"University of Alabama at Birmingham","phase":"marketed","status":"active","modality":"Small molecule","aliases":["Acetaminophen/Caffeine"],"developmentCodes":[],"firstApprovalDate":null,"firstApprovalCountry":null,"aiSummary":"Occipital Nerve Block (ONB) is a procedural intervention—not a traditional pharmaceutical drug—administered by University of Alabama at Birmingham and other academic medical centers for management of headache disorders including migraine, post-traumatic headache, and occipital neuralgia. The procedure involves injection of local anesthetic (typically lidocaine or bupivacaine) with or without corticosteroids around the greater occipital nerve at the base of the skull, providing rapid symptom relief through local anesthetic blockade and potential anti-inflammatory effects. Currently in clinical use with 50 registered trials spanning Phase 1–4 and observational studies, ONB demonstrates efficacy across acute migraine, episodic migraine, chronic migraine, post-operative pain, and medication-overuse headache, with particular strength in pregnancy-related headache where systemic alternatives are contraindicated. Clinical differentiation centers on non-systemic delivery, rapid onset, and safety profile in vulnerable populations; competitive positioning against oral triptans, CGRP antagonists, and other interventional procedures remains evolving. Commercial significance is limited by procedural nature and lack of branded pharmaceutical revenue; reimbursement varies by payer and geography. Pipeline expansion includes ultrasound-guided techniques, radiofrequency ablation variants, and application to spontaneous intracranial hypotension.","enrichmentLevel":3,"visitCount":0,"mechanism":{"_ai_source":"claude-haiku-4.5","explanation":"The procedure involves injecting local anesthetic (typically lidocaine or bupivacaine) around the greater and/or lesser occipital nerves at the base of the skull. This blocks pain signal transmission from the occipital nerve distribution, providing temporary relief of occipital neuralgia and related headache conditions. The effect is reversible and typically lasts from days to weeks depending on the anesthetic used.","oneSentence":"An occipital nerve block is a local anesthetic injection that temporarily numbs the occipital nerves to relieve pain in the back of the head and neck.","_ai_confidence":"medium"},"administration":{},"safety":{"commonSideEffects":[{"rate":null,"effect":"Temporary numbness or tingling at injection site"},{"rate":null,"effect":"Mild pain at injection site"},{"rate":null,"effect":"Temporary dizziness"},{"rate":null,"effect":"Infection (rare)"},{"rate":null,"effect":"Nerve injury (rare)"}]},"trials":[],"indications":{"approved":[{"name":"Occipital neuralgia"},{"name":"Migraine headaches"},{"name":"Tension-type headaches"},{"name":"Cervicogenic headaches"}]},"commercial":null,"patents":[],"timeline":[],"rwe":[],"competitors":[],"ownershipHistory":[],"trialDetails":[{"nctId":"NCT07496632","phase":"NA","title":"Effect of Scalp Block on Intraoperative Hemodynamics and Postoperative Pain in Craniotomy Patients\"","status":"NOT_YET_RECRUITING","sponsor":"Bangladesh Medical University","startDate":"2026-04","conditions":["Scalp Block"],"enrollment":72,"completionDate":"2026-10"},{"nctId":"NCT07497646","phase":"NA","title":"Repeated Bilateral Greater Occipital Nerve Blockade in Chronic Migraine and Chronic Tension-Type Headache","status":"COMPLETED","sponsor":"Saglik Bilimleri Universitesi","startDate":"2025-01-01","conditions":["Chronic Migraine Headache","Chronic Tension-type Headache"],"enrollment":290,"completionDate":"2025-09-30"},{"nctId":"NCT07487649","phase":"","title":"Treatment Response in Patients With Medication-Overuse Headache","status":"RECRUITING","sponsor":"Sultan 1. Murat State Hospital","startDate":"2026-03-17","conditions":["Medication-overuse Headache","Treatment","Headache","Greater Occipital Nerve Block"],"enrollment":70,"completionDate":"2026-05-30"},{"nctId":"NCT05734625","phase":"PHASE2","title":"Efficacy of Nerve Blocks for Episodic Migraine","status":"RECRUITING","sponsor":"Mayo Clinic","startDate":"2023-07-10","conditions":["Episodic Migraine"],"enrollment":60,"completionDate":"2027-07"},{"nctId":"NCT06764433","phase":"NA","title":"Greater Occipital Nerve Pulsed Radiofrequency in Cervicogenic Headache","status":"COMPLETED","sponsor":"Ankara City Hospital Bilkent","startDate":"2023-03-01","conditions":["Headache","Cervicogenic Headache","Occipital Nerve Block","Pulsed Radiofrequency"],"enrollment":25,"completionDate":"2024-12-01"},{"nctId":"NCT07425678","phase":"PHASE4","title":"Comparison of Systemic Opioid (Morphine) and Pre-Incision Bilateral Scalp Nerve Block for Pain Management in Craniotomy Patients","status":"COMPLETED","sponsor":"Aga Khan University","startDate":"2025-01-01","conditions":["Supratentorial Tumors"],"enrollment":62,"completionDate":"2025-09-30"},{"nctId":"NCT07363083","phase":"","title":"Treatment Response to GON Pulsed Radiofrequency in Elderly Patients With Chronic Migraine","status":"NOT_YET_RECRUITING","sponsor":"Ankara City Hospital Bilkent","startDate":"2026-03-01","conditions":["Headache, Migraine"],"enrollment":100,"completionDate":"2027-05-01"},{"nctId":"NCT07395908","phase":"NA","title":"The Effect of Interventional Procedures on Serum CGRP and PACAP-38 Levels in Chronic Migraine","status":"ACTIVE_NOT_RECRUITING","sponsor":"Aydin Adnan Menderes University","startDate":"2025-05-29","conditions":["Chronic Migraine Headache","Radiofrequency Ablation","Greater Occipital Nerve Block","Calcitonin Gene-related Peptide","Pacap-38"],"enrollment":100,"completionDate":"2026-06"},{"nctId":"NCT06069791","phase":"PHASE1","title":"Greater Occipital Nerve Blockade in Veterans With Post-concussion Headache: Sub-study 1","status":"RECRUITING","sponsor":"Yale University","startDate":"2024-01-26","conditions":["Post-Traumatic Headache"],"enrollment":12,"completionDate":"2026-12-31"},{"nctId":"NCT07366060","phase":"NA","title":"Effectiveness of Third Occipital Nerve Pulsed Radiofrequency in Cervicogenic Headache","status":"RECRUITING","sponsor":"Ankara City Hospital Bilkent","startDate":"2026-02-01","conditions":["Cervicogenic Headache","Third Occipital Nerve"],"enrollment":25,"completionDate":"2026-09-01"},{"nctId":"NCT05289804","phase":"PHASE1,PHASE2","title":"Diminishing Accelerated Long-term Forgetting in Mild Cognitive Impairment","status":"COMPLETED","sponsor":"University of Dublin, Trinity College","startDate":"2022-09-01","conditions":["Mild Cognitive Impairment","Memory Impairment","Memory Disorders in Old Age"],"enrollment":80,"completionDate":"2026-01-01"},{"nctId":"NCT06374524","phase":"","title":"Greater Occipital Nerve Block for Spontaneous Intracranial Hypotension","status":"RECRUITING","sponsor":"University Health Network, Toronto","startDate":"2024-08-01","conditions":["Spontaneous Intracranial Hypotension"],"enrollment":34,"completionDate":"2027-12-31"},{"nctId":"NCT07347067","phase":"NA","title":"Clinical Study of Myofascial Trigger Points(MTrPs) Injection in the Treatment of Chronic Migraine","status":"RECRUITING","sponsor":"Beijing Tiantan Hospital","startDate":"2025-12-01","conditions":["Myofascial Trigger Points","Chronic Migraine Headache","Greater Occipital Nerve Block"],"enrollment":1036,"completionDate":"2027-06-01"},{"nctId":"NCT07344181","phase":"NA","title":"Efficacy of Liposomal Bupivacaine Scalp Nerve Block for Postoperative Pain Management After Supratentorial Craniotomy","status":"ACTIVE_NOT_RECRUITING","sponsor":"Beijing Tiantan Hospital","startDate":"2024-12-01","conditions":["Postoperative Care"],"enrollment":118,"completionDate":"2027-05-01"},{"nctId":"NCT07307508","phase":"NA","title":"Efficacy of Scalp Block in Managing Post Subarachnoid Hemorrhage Headache in Critically Ill Patients. A Single Centre Randomized Controlled Trial","status":"RECRUITING","sponsor":"Hamad Medical Corporation","startDate":"2025-10-22","conditions":["Aneurysmal Subarachnoid Hemorrhage (aSAH)","Headache Disorders"],"enrollment":22,"completionDate":"2026-12-30"},{"nctId":"NCT03007420","phase":"PHASE3","title":"A Prospective Controlled Treatment Trial for Post-Traumatic Headaches","status":"TERMINATED","sponsor":"Boston Children's Hospital","startDate":"2018-01-02","conditions":["Post-Traumatic Headaches"],"enrollment":16,"completionDate":"2024-06-14"},{"nctId":"NCT07170111","phase":"NA","title":"Predictors of GON Blockade Success in Migraine","status":"NOT_YET_RECRUITING","sponsor":"Başakşehir Çam & Sakura City Hospital","startDate":"2025-09-15","conditions":["Migraine"],"enrollment":460,"completionDate":"2026-12-01"},{"nctId":"NCT07143799","phase":"NA","title":"Scalp Block Versus General Anesthesia in Patients Undergoing Evacuation of Subdural Hematoma Via Burr Hole","status":"RECRUITING","sponsor":"Sohag University","startDate":"2025-08-11","conditions":["Subdural Hematoma"],"enrollment":80,"completionDate":"2026-03-20"},{"nctId":"NCT07131046","phase":"NA","title":"A Comparative Analysis of Combined Superficial Cervical Plexus and Supraorbital Blocks Compared to Scalp Blocks During Craniotomy: a Review of Opioid Consumption and The Suppression of Hemodynamic Responses","status":"COMPLETED","sponsor":"Indonesia University","startDate":"2025-02-18","conditions":["Craniotomy Surgery","Regional Anaesthesia","Scalp Block","Plexus Block;Analgesia;Neurosurgery"],"enrollment":41,"completionDate":"2025-05-09"},{"nctId":"NCT05732532","phase":"PHASE4","title":"Steroids in Occipital Nerve Block for Treatment of Headache","status":"COMPLETED","sponsor":"Mayo Clinic","startDate":"2023-02-17","conditions":["Headache","Occipital Nerve Block"],"enrollment":120,"completionDate":"2025-06-01"},{"nctId":"NCT07068451","phase":"NA","title":"Greater Occipital Nerve Block Alone Versus Dual Nerve Block in Cervicogenic Headache and Occipital Neuralgia","status":"COMPLETED","sponsor":"Tishreen University Hospital","startDate":"2020-01-01","conditions":["Ervicogenic Headache (CEH)","Occipital Neuralgia (ON)"],"enrollment":160,"completionDate":"2023-04-01"},{"nctId":"NCT07058636","phase":"NA","title":"Efficacy of Adding Greater Occipital Nerve Block to Trigger Point Injection in Patients With Neck Pain","status":"RECRUITING","sponsor":"Ankara Etlik City Hospital","startDate":"2025-04-03","conditions":["Neck Pain","Myofacial Pain Syndrome","Trigger Point Pain, Myofascial","Trigger Points","Upper Trapezius Trigger Points","Cervicogenic Headache"],"enrollment":60,"completionDate":"2026-04"},{"nctId":"NCT07043621","phase":"NA","title":"When to Block? Timing of Scalp Block in Craniotomy","status":"NOT_YET_RECRUITING","sponsor":"Sakarya University","startDate":"2025-06","conditions":["Scalp Block","Regional Anesthesia","Craniotomy Surgery","QoR-40"],"enrollment":60,"completionDate":"2025-12"},{"nctId":"NCT06997562","phase":"NA","title":"Greater Occipital Nerve Blockade and Sphenopalatine Ganglion Blockade in Patients With Episodic Migraine","status":"COMPLETED","sponsor":"New Valley University","startDate":"2024-05-01","conditions":["Greater Occipital Nerve Block","Sphenopalatine Ganglion Block","Episodic Migraine"],"enrollment":60,"completionDate":"2025-05-03"},{"nctId":"NCT06951256","phase":"NA","title":"Dexmedetomidine as an Adjuvant to Bupivacaine in Scalp Block vs Bupivacaine Alone for Hemodynamics Stability in Craniotomy","status":"COMPLETED","sponsor":"Ain Shams University","startDate":"2024-03-10","conditions":["Dexmedetomidine","Craniotomy","Regional Anesthesia","Mean Arterial Pressure 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Hospital","startDate":"2024-10-07","conditions":["Analgesia"],"enrollment":40,"completionDate":"2024-11-11"},{"nctId":"NCT06684249","phase":"NA","title":"Efficacy of Nerve Block Versus Botox in Chronic Migraine Management","status":"RECRUITING","sponsor":"Zagazig University","startDate":"2024-11-10","conditions":["Chronic Migraine","Chronic Migraine, Headache"],"enrollment":64,"completionDate":"2025-07-10"},{"nctId":"NCT06662461","phase":"NA","title":"Ultrasound Guided Block of Stellate Ganglion Versus Greater Occipital Nerve in Resistant Migraine and Correlation to Calcitonin Gene Related Peptide","status":"RECRUITING","sponsor":"Ain Shams University","startDate":"2024-02-01","conditions":["Migraine"],"enrollment":40,"completionDate":"2025-03"},{"nctId":"NCT06646081","phase":"NA","title":"The Impact of Greater Occipital Nerve and Stellate Ganglion Block Treatments on Sleep in Chronic Headache Management","status":"NOT_YET_RECRUITING","sponsor":"Ankara Etlik City Hospital","startDate":"2024-11-15","conditions":["Chronic Headache","Chronic Headache Disorder","Migraine"],"enrollment":86,"completionDate":"2025-07-15"},{"nctId":"NCT06157359","phase":"NA","title":"Effect of SNB on the QoR in Patients Undergoing Supratentorial Tumor Resection","status":"UNKNOWN","sponsor":"Second Affiliated Hospital, School of Medicine, Zhejiang University","startDate":"2023-11-14","conditions":["Postoperative Analgesia","Quality of Recovery","Supratentorial Tumor","Craniotomy","Scalp Nerve Block"],"enrollment":84,"completionDate":"2024-10-31"},{"nctId":"NCT06470854","phase":"NA","title":"Effect of Nebulized Dexmedetomidine on Post-dural Puncture Headache","status":"COMPLETED","sponsor":"Tanta University","startDate":"2023-11-01","conditions":["Post-Dural Puncture Headache"],"enrollment":50,"completionDate":"2024-03-22"},{"nctId":"NCT06432127","phase":"PHASE4","title":"Role of Ultrasound Guide Greater Occipital Nerve Block at Second Cervical Vertebra in Migraine 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University","startDate":"2023-09-01","conditions":["Migraine"],"enrollment":40,"completionDate":"2024-01-01"},{"nctId":"NCT05888298","phase":"NA","title":"Proximal and Distal Approach GON RFT in Migraine","status":"UNKNOWN","sponsor":"Diskapi Teaching and Research Hospital","startDate":"2022-09-01","conditions":["Migraine Disorders","Headache Migraine Chronic"],"enrollment":60,"completionDate":"2023-12-28"},{"nctId":"NCT03951649","phase":"PHASE4","title":"Acute Headache Treatment in Pregnancy: Occipital Nerve Block vs PO Acetaminophen With Caffeine","status":"COMPLETED","sponsor":"University of Alabama at Birmingham","startDate":"2020-02-10","conditions":["Headache","Pregnancy Related","Occipital Nerve Block"],"enrollment":62,"completionDate":"2022-12-31"},{"nctId":"NCT06149299","phase":"NA","title":"Great Occipital Nerve Block Using Different Approach","status":"UNKNOWN","sponsor":"Keimyung University Dongsan Medical Center","startDate":"2023-11-13","conditions":["Pain, Chronic"],"enrollment":24,"completionDate":"2024-06-30"},{"nctId":"NCT06122545","phase":"NA","title":"Chronic Migraine Prophylaxis: Ultrasound-Guided Greater Occipital Nerve Block Versus Medical Treatment","status":"UNKNOWN","sponsor":"Tanta University","startDate":"2022-05-01","conditions":["Greater Occipital Nerve Block","Medical Treatment","Chronic Migraine"],"enrollment":80,"completionDate":"2024-05-01"},{"nctId":"NCT04749797","phase":"PHASE4","title":"Cranial Blocks for Postoperative Anesthesia","status":"TERMINATED","sponsor":"University of Pennsylvania","startDate":"2020-09-02","conditions":["Craniotomy Surgery"],"enrollment":11,"completionDate":"2021-07-20"},{"nctId":"NCT05446597","phase":"NA","title":"SMART Concussion Trial: Symptom Management vs Alternative Randomized Treatment of Concussion Trial","status":"UNKNOWN","sponsor":"University of Calgary","startDate":"2023-04-10","conditions":["Mild Traumatic Brain Injury","Headaches Posttraumatic","Neck Pain","Dizziness"],"enrollment":164,"completionDate":"2025-04-30"},{"nctId":"NCT04750967","phase":"NA","title":"Amitriptyline vs GON and SON Blocks in Migraine","status":"COMPLETED","sponsor":"Dr. Lutfi Kirdar Kartal Training and Research Hospital","startDate":"2021-04-03","conditions":["Migraine","Headache"],"enrollment":57,"completionDate":"2023-07-15"},{"nctId":"NCT04505280","phase":"NA","title":"Greater Occipital Nerve and Cervical Region Injection in Patients With Trigeminal Neuralgia","status":"COMPLETED","sponsor":"Dr. Lutfi Kirdar Kartal Training and Research Hospital","startDate":"2020-07-01","conditions":["Trigeminal Neuralgia"],"enrollment":29,"completionDate":"2022-12-30"},{"nctId":"NCT05499689","phase":"NA","title":"Transcutaneous Pulsed Radiofrequency in Migraine","status":"UNKNOWN","sponsor":"Diskapi Teaching and Research Hospital","startDate":"2021-06-22","conditions":["Migraine 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Headache"],"enrollment":42,"completionDate":"2022-06-30"},{"nctId":"NCT03762343","phase":"PHASE3","title":"Ultrasound-guided Greater Occipital Nerve Block in Children Undergoing Posterior Fossa Craniotomy","status":"COMPLETED","sponsor":"Kasr El Aini Hospital","startDate":"2019-01-01","conditions":["Posterior Fossa Tumor"],"enrollment":40,"completionDate":"2020-12-01"},{"nctId":"NCT05464212","phase":"NA","title":"Comparison of the Efficacy of Ultrasound-guided Greater Occipital Nerve Block and Pulsed Radiofrequency Therapy in Chronic Migraine Patients","status":"COMPLETED","sponsor":"Eskisehir Osmangazi University","startDate":"2019-04-01","conditions":["Chronic Migraine, Headache"],"enrollment":32,"completionDate":"2020-04-30"},{"nctId":"NCT05353764","phase":"NA","title":"Effect of Scalp Nerve Block on the Recovery Quality of Parkinson's Patients After Deep Brain Stimulation","status":"UNKNOWN","sponsor":"Changhai Hospital","startDate":"2022-04-20","conditions":["Parkinson Disease"],"enrollment":88,"completionDate":"2023-03-01"},{"nctId":"NCT02655523","phase":"PHASE4","title":"A Comparison of Dexamethasone and Triamcinolone for Ultrasound-guided Occipital C2 Nerve Blocks","status":"WITHDRAWN","sponsor":"Northwestern University","startDate":"2015-12","conditions":["Headache"],"enrollment":0,"completionDate":"2022-06"},{"nctId":"NCT04955236","phase":"PHASE1","title":"Partial Scalp Block in Posterior Fossa Surgery","status":"COMPLETED","sponsor":"Kasr El Aini Hospital","startDate":"2021-07-14","conditions":["Posterior Fossa Tumor"],"enrollment":40,"completionDate":"2021-11-25"},{"nctId":"NCT03435185","phase":"NA","title":"Greater Occipital and Supraorbital Nerve Blockade in Migraine Patients","status":"COMPLETED","sponsor":"Dr. Lutfi Kirdar Kartal Training and Research Hospital","startDate":"2014-09-01","conditions":["Migraine Disorders"],"enrollment":103,"completionDate":"2016-06-01"},{"nctId":"NCT04124458","phase":"NA","title":"Occipital Nerve RF Between Occipital Nerve Block And Occipital Nerve Radiofrequency Ablation","status":"UNKNOWN","sponsor":"Allevio Pain Management Clinic","startDate":"2023-01-02","conditions":["Occipital Neuralgia","Headache"],"enrollment":70,"completionDate":"2025-12-31"},{"nctId":"NCT03159000","phase":"PHASE4","title":"A Research Study of Greater Occipital Nerve Block as a Treatment for Acute Migraine Attacks","status":"WITHDRAWN","sponsor":"Thomas Jefferson University","startDate":"2017-05-01","conditions":["Migraine"],"enrollment":0,"completionDate":"2018-06-30"},{"nctId":"NCT03269435","phase":"PHASE4","title":"Greater Occipital Nerve Block Versus Metoclopramide","status":"COMPLETED","sponsor":"Montefiore Medical Center","startDate":"2017-11-01","conditions":["Migraine"],"enrollment":99,"completionDate":"2020-03-21"},{"nctId":"NCT03478735","phase":"NA","title":"Ultrasound Greater Occipital Nerve Block at C2 Level Compared to Landmark-based Greater Occipital Nerve Block","status":"COMPLETED","sponsor":"Mayo Clinic","startDate":"2017-07-17","conditions":["Occipital Neuralgia","Cervicogenic Headache","Migraine Without Aura"],"enrollment":32,"completionDate":"2021-06-14"},{"nctId":"NCT04491474","phase":"PHASE4","title":"Comparison of Great Occipital Nerve and Supraorbital Nerve Blockade Methods at Treatment of Acute Migraine Attack in the Emergency Department","status":"COMPLETED","sponsor":"Dr. Lutfi Kirdar Kartal Training and Research Hospital","startDate":"2020-08-15","conditions":["Migraine Disorders"],"enrollment":128,"completionDate":"2021-03-14"},{"nctId":"NCT02665273","phase":"PHASE3","title":"Greater Occipital Nerve Block With Bupivacaine for Acute Migraine","status":"COMPLETED","sponsor":"Montefiore Medical Center","startDate":"2015-07-01","conditions":["Migraine"],"enrollment":28,"completionDate":"2018-01"},{"nctId":"NCT03156049","phase":"NA","title":"Sphenopalatine Ganglion Block Versus Occiptal Nerve Block in Treatment of Post Dural Puncture Headache","status":"COMPLETED","sponsor":"Assiut University","startDate":"2017-07-14","conditions":["Headache"],"enrollment":93,"completionDate":"2019-06-21"},{"nctId":"NCT04454541","phase":"NA","title":"Efficacy of Ultrasound-Guided Multifidus Cervicis Plan Block Vs Greater Occipital Nerve Block for Cervicogenic Headache","status":"COMPLETED","sponsor":"Abha International Private Hospital","startDate":"2019-05-01","conditions":["Cervicogenic Headache"],"enrollment":60,"completionDate":"2019-12-01"},{"nctId":"NCT04034836","phase":"PHASE4","title":"Parecoxib as an Adjuvant to Scalp Nerve Blocks for Relief of Post-craniotomy Pain","status":"UNKNOWN","sponsor":"Beijing Tiantan Hospital","startDate":"2019-10-12","conditions":["Pain, Postoperative","Neurosurgery"],"enrollment":132,"completionDate":"2021-12-31"},{"nctId":"NCT04017741","phase":"PHASE4","title":"A Study Investigating the Efficacy of GON Blocks.","status":"COMPLETED","sponsor":"Barts & The London NHS 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