# An Observational Study of BOTOX® as Headache Prophylaxis for Chronic Migraine

> **NCT01686581** · — · COMPLETED · sponsor: **Allergan** · enrollment: 641 (actual)

## Conditions studied

- Migraine Disorders

## Interventions

- **DRUG:** botulinum toxin Type A

## Key facts

- **NCT ID:** NCT01686581
- **Lead sponsor:** Allergan
- **Sponsor class:** INDUSTRY
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** COMPLETED
- **Start date:** 2012-07-23
- **Primary completion:** 2016-10-12
- **Final completion:** 2016-10-12
- **Target enrollment:** 641 (ACTUAL)
- **Last updated:** 2018-11-09


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT01686581

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT01686581, "An Observational Study of BOTOX® as Headache Prophylaxis for Chronic Migraine". Retrieved via AI Analytics 2026-06-25 from https://api.ai-analytics.org/clinical/NCT01686581. Licensed CC0.

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