# A Retrospective Study to Evaluate the Effectiveness and Benefit of onabotulinumtoxinA in Patients With Chronic Migraines

> **NCT01749410** · — · COMPLETED · sponsor: **Allergan** · enrollment: 33 (actual)

## Conditions studied

- Chronic Migraine, Headaches

## Interventions

- **BIOLOGICAL:** onabotulinumtoxinA

## Key facts

- **NCT ID:** NCT01749410
- **Lead sponsor:** Allergan
- **Sponsor class:** INDUSTRY
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** COMPLETED
- **Start date:** 2013-05
- **Primary completion:** 2014-05
- **Final completion:** 2014-05
- **Target enrollment:** 33 (ACTUAL)
- **Last updated:** 2015-09-10


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT01749410

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT01749410, "A Retrospective Study to Evaluate the Effectiveness and Benefit of onabotulinumtoxinA in Patients With Chronic Migraines". Retrieved via AI Analytics 2026-06-08 from https://api.ai-analytics.org/clinical/NCT01749410. Licensed CC0.

---

*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*