Botulinum Toxin Type A in Treatment of Cranial Allodynia in Patients With Headache

Study Overview
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Brief Summary
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The objective of this study is evaluated if the Botulinum Toxin Type A is superior to 0,9% saline in treatment of cranial Allodynia in patients with headache. Hypothesis H(0): Botulinum Toxin Type A is not superior to 0,9% saline in treatment of cranial Allodynia in patients with headache H (1): Botulinum Toxin Type A is superior to 0,9% saline in treatment of cranial Allodynia in patients with headache

Detailed Description
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After adequation and approve from ethics committee on research involving human the selection of patients with tension headache or migraine according to The International Classification of Headache Disorders, 2nd Edition (ICHD II) will start in the Headache Clinic of Alcides Carneiro Universitary Hospital. Those selected will be oriented regarding to the study steps and potential risks of the procedures. The patients will catalog the occurrence of headache and use of analgesics for 30 days through daily headache. At the end of this month patients will be evaluated by a physician experienced in the treatment of headache to define the occurrence of pain or allodynia of the scalp. Data gathered in this consultation will be recorded in standardized questionnaires for the study. The questionnaire is divided: Patient's identification, illustration of the pain area and allodynea points, pain intensity by Visual Analogue Scale (VAS) and finally medication use will be collected in the Headache Diary. The people are randomized with block permutation, security of equal distribution in two groups (number previous determined). One group with 0,9% saline and the other Botulinum Toxin A. Finishing the application by the Researcher (Who doesn't know the result of randomization and the infiltrated containing). The patients will be submit to three evaluations: the first, 30 days after infiltration, with a doctor who didn't participate of the anterior steps and will analyze the pain intensity by Visual Analogue Scale (VAS), an episode of headache and use of painkiller trough Headache Diary. The Doctor will ask to the patient localize, if exist, the allodynia points. The others evolution visit will happen 60 and 90 days after application, with this same doctor using the same methods. Another professional, who doesn't know about the anterior steps of the study, will do the statics data analyze.

Official Title
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Botulinum Toxin Type A Versus 0,9% Saline in Treatment of Cranial Allodynia in Patients With Headache

Conditions
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Headache, Allodynia

Intervention / Treatment
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* Drug: Botulinum toxin type A
* Drug: 0,9% saline


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients diagnosed with tensional headache or migraine as The International Classification of Headache Disorders, 2nd Edition - ICHD II Patients from both sexes older than 18 years Exclusion Criteria: Fill the diagnostics criteria for more than one type of primary headache as ICHD II Another neurological disease or systemic illness that causes headache. Condition that contraindicate the use of Study's Medication. Cognitive impairment Use of botulinum toxin within the last six months Blood, liver, or kidney disorders and pregnant or lactating women

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Btx-A: Active Comparator<br>Botulinum Toxin group Will have the syringe with Botulinum toxin type A . During the study the patients will be following in the headache's clinic where the evaluator will graduate the pathologies' evolution. | Drug: Botulinum toxin type A<br>* Botulinum Toxin group Will have the syringe with Botulinum toxin type A . During the study the patients will be following in the headache's clinic where the evaluator will graduate the pathologies' evolution.<br>|
| Placebo Comparator: Placebo Comparator<br>0,9% saline group Will have the syringe with 0,9% saline. During the study the patients will be following in the headache's clinic where the evaluator will graduate the pathologies' evolution . | Drug: 0,9% saline<br>* 0,9% saline group Will have the syringe with 0,9% saline. During the study the patients will be following in the headache's clinic where the evaluator will graduate the pathologies' evolution .<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Evaluate the allodynea's improvement following these criteria | Evaluate the allodynea's improvement following these criteria: Disappearing at least 50% infiltrated painful points. | six months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Evaluate the headache's improvement following these criteria: | Headache's episodes reduction at least 50% in the last month or pain intensity reduction by Visual Analogue Scale (VAS) in at least three points or dose's painkiller reduction at least 50%. | six months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Headache, Allodynia, Botulinum Toxin Type A