A Retrospective Study to Evaluate the Effectiveness of onabotulinumtoxinA in Preventing Headaches in Patients With Chronic Migraines

Status

Withdrawn

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT01749423

Enrollment

Registered

2012-12-13

Start date

2012-11-30

Completion date

2013-12-31

Last updated

2014-02-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Chronic Migraine, Headache

Brief summary

This study will evaluate the effectiveness of OnabotulinumtoxinA to prevent headaches in patients with Chronic Migraine.

Interventions

BIOLOGICALOnabotulinumtoxinA

Previous treatment with onabotulinumtoxinA for Chronic Migraine.

Study design

Observational model

CASE_ONLY

Time perspective

RETROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

18 Years to 65 Years

Healthy volunteers

Inclusion criteria

* History of chronic migraines * 15 or more headache days over a 30 day period * A minimum of 2 consecutive treatment cycles of 100 units onabotulinumtoxinA and a minimum of 2 consecutive treatment cycles with the onabotulinumtoxinA dosing between 155 and 195 units

Exclusion criteria

* Any treatment cycle dose of onabotulinumtoxinA greater than 200 units

Design outcomes

Primary

Measure	Time frame
Number of Headache Days	Up to 56 Weeks

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026