Medical Information Only. Always consult your healthcare provider before enrolling in any clinical trial.
NCT03666663 · ClinicalTrials.gov registry record · Phase 4
Sphenopalatine Ganglion Blocks RCT
A Phase 4 study, sponsored by University of California, San Francisco.
- Completed
- Registry status
- Phase 4
- Development phase
- 10
- Enrollment target
NCT03666663: Completed Phase 4 study, sponsored by University of California, San Francisco.
NCT03666663 is a Phase 4 study that has completed, run by University of California, San Francisco. The registered enrollment target is 10 participants, below the 518-participant average among 9,235 other Phase 4 trials with a reported enrollment target (98% lower). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT03666663, a Phase 4 study, has completed, sponsored by University of California, San Francisco.
- COMPLETED
- Registry status
- Phase 4
- Development phase
- 10 participants
- Enrollment target
Study Summary
RCT of Sphenopalatine Ganglion (SPG) Blocks using anesthetics vs. placebo for migraine.
Primary Outcome
Reduction in headache days from baseline to month 8 of treatment as self- reported by the patients (yes/no) and as per headache diary and retrospective charts review documentation
Interventions
- DRUG Placebo
- DRUG Bupivacaine
- DRUG Lidocaine
- DRUG Ropivacaine
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 10 participants |
| Start Date | 2019-02-01 |
| Est. Completion | 2021-07-08 |
| Phase | Phase 4 |
What the finished NCT03666663 record still lists
NCT03666663 is an interventional study that assigns participants to a tested intervention. The registry caps enrollment at 10 participants, a relatively small participant target, below the 518-participant average among 9,235 other Phase 4 trials with a reported enrollment target (98% lower).
The record links to 0 conditions, and to 4 interventions - of which Placebo is the first listed.
NCT03666663 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT03666663 about?
NCT03666663 is a clinical study titled "Sphenopalatine Ganglion Blocks RCT". RCT of Sphenopalatine Ganglion (SPG) Blocks using anesthetics vs. placebo for migraine.
What is the current status of trial NCT03666663?
This trial is currently completed. It is a Phase 4 study. The enrollment target is 10 participants. The study started on 2019-02-01. Estimated completion is 2021-07-08.
What interventions are being tested in trial NCT03666663?
The interventions under investigation include: Placebo (DRUG), Bupivacaine (DRUG), Lidocaine (DRUG), Ropivacaine (DRUG).
Who is sponsoring clinical trial NCT03666663?
This trial is sponsored by University of California, San Francisco, which has 1,713 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT03666663's enrollment target sits among peer trials
10 1940th of 2000 higher than 33 of 2,000 other Phase 4 trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other Phase 4 trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov registry export · 2026-08-08
Nationwide trials with similar profiles
Cross-condition peers matched on enrollment target and registry start date, not the same-condition list above.
Similar enrollment target
- NCT00623389 · 10 participants · NA
Evaluation of an Advanced Lower Extremity Neuroprostheses
- NCT01241864 · 10 participants · Phase 2
Islet Transplantation in Type 1 Diabetic Kidney Allograft
- NCT01293214 · 10 participants · NA
Vascularized Composite Allotransplantation for Multiple Extremity Amputations
- NCT01474148 · 10 participants · NA
A Neuroprosthesis for Seated Posture and Balance
Similar registry start date
- NCT05962346 · started 2026-12 · NA
Fetal Endoscopic Tracheal Occlusion for Congenital Diaphragmatic Hernia
- NCT07125183 · started 2026-12 · Phase 2
Study on Efficacy and Tolerability of Weekly Doxorubicin in Elderly Patients With Advanced or Metastatic Leiomyosarcoma
- NCT07292298 · started 2026-11 · Phase 2
Phase 2 Single-Arm Rectal Cancer Brachytherapy for Patients With Low-Lying Residual Adenocarcinoma After Total Neoadjuvant Therapy to Improve Organ Preservation Rates
- NCT04263285 · started 2026-10 · NA
Treatment of Depression Post-SCI