Comparison of Two Commercial Preparations of Botulinum Toxin Type A

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00959907
Recruitment Status : Completed
First Posted : August 17, 2009
Results First Posted : August 17, 2009
Last Update Posted : December 15, 2009
Information provided by:
Brazilan Center for Studies in Dermatology

April 23, 2009
August 17, 2009
April 23, 2009
August 17, 2009
December 15, 2009
May 2005
November 2007   (Final data collection date for primary outcome measure)
  • Horizontal Action Halo Diameter at 28 Days [ Time Frame: 28 days ]
  • ECMAP in m. Frontialis BoNT A1(4U) X BoNT A2 (2U) [ Time Frame: 28 days ]
  • Horizontal Action Halo Diameter at 112 Days [ Time Frame: 112 days ]
Same as current
Complete list of historical versions of study NCT00959907 on Archive Site
Not Provided
Not Provided
Not Provided
Not Provided
Comparison of Two Commercial Preparations of Botulinum Toxin Type A
A Phase iv Controlled Randomized Blinded Study on the Anhydrotic Action Halos and Muscle Activity of Two Commercial Preparations Type a Botulinum Toxin (Dysport® and Botox® ) Administered to the Upper Third of the Face
The objective of this study is to compare the action halos of the botulinum toxins (Dysport® and Botox®) using two equivalence-ratios and to gather supportive information, such as more detailed data on the effectiveness in reduction of wrinkles and duration of action on the upper part of the face of both products, trough scales and photographs evaluations.
This was a monocentric, prospective, randomized and double-blind study. Fifty nine female patients, presenting with moderate to severe forehead wrinkles, with sweating ability who had never undergone previous BoNT-A injections were enrolled. There were two randomizations, one related to the dose-equivalence (2:1U and 2.5:1U), both reconstituted in the same volume of 0.02 mL per point and another related to the forehead side (left or right) for application of the tested drugs. Baseline, twenty-eight and 112 days later, clinical and photographic assessments, Minor´s test, and electromyographic (EMG) evaluations were performed.
Phase 4
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double (Participant, Investigator)
Primary Purpose: Treatment
Wrinkles in Frontal Area

On Visit 1 (Day 0):

Botulinum toxin A (Dysport® and Botox®) will be administered according to an equivalence ratio of 2:1. Both reconstituted in the same volume per point, injected in the forehead determined site.

  • Dysport®: 4 units will be injected in the left or right forehead side.
  • Botox® : 2 units will be injected in the left or right forehead side.(opposite side of dysport injection)
Other Names:
  • BoNT A1 = Dysport
  • BoNT A2 = Botox
  • Active Comparator: BoNT A1 (4U)
    BoNT A1 (4U): Botulinum toxin A (Dysport®)4 units
    Intervention: Drug: BOTULINUM TOXIN TYPE-A
  • Active Comparator: BoNT-A2 (2U)
    BoNT-A2(2U): Botulinum toxin A (Botox®) 2 units
    Intervention: Drug: BOTULINUM TOXIN TYPE-A
Not Provided

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
December 2007
November 2007   (Final data collection date for primary outcome measure)

Inclusion Criteria:

  1. Written Informed Consent (Annex 1)
  2. Female
  3. Subjects agreeing to take part in all procedures of the study, including botulinum toxin applications, Minor's test, measurement of Evoked Potentials, photographs, etc.), after being fully informed on the objectives and nature of the investigations
  4. Subjects aged between 18 and 60 years
  5. Subjects presenting with moderate to severe wrinkles on the forehead under maximum voluntary contraction of the m. frontalis
  6. Subjects with positive Minor's test showing sweating on the forehead in standardized conditions described in Annex 2

    *The Minor's Test will be the last inclusion criterion to be evaluated. Only these patients eligible according to the other inclusion criteria will undergo the Minor's Test to evaluate their sweating on the forehead. The cut off point is a positive Minor's Test (Level +1) - only subjects with Minor's Test (Level +1) will be recruited in the study (Annex 2).

  7. Medical history and physical examination which, based on the investigator's opinion, do not prevent the patient from taking part in the study and use the products under investigation
  8. Subjects of childbearing age should present a negative urine pregnancy test at baseline and should be using an effective contraceptive method;
  9. Availability of the patient throughout the duration of the study (112 days)
  10. Subject agrees not to undergo other cosmetic or dermatological procedures during the study
  11. Subjects with sufficient schooling and awareness to enable them to cooperate to the degree required by this protocol

Exclusion Criteria:

  1. Pregnant women or women intending to become pregnant in the next 4 months after screening for eligibility
  2. Subjects who are lactating
  3. Subjects having undergone botulinum toxin treatment within the last 6 months
  4. Subjects participating in other clinical trials
  5. Any prior surgery affecting the frontalis and/or orbicularis muscles, prior blepharoplasty or brow lift
  6. Any prior cosmetic procedures, including fillers, or scars that may interfere with the study results
  7. Subjects presenting fronto-parietal alopecia according to the Norwood-Hamilton classification
  8. Subjects with neoplastic, muscular or neurological diseases
  9. Subjects using aminoglycoside and penicillamine antibiotics, quinine and Ca2+ channel blockers
  10. Subjects with inflammation or active infection in the area to be injected
  11. Subjects presenting evident facial asymmetry
  12. Subjects with a history of adverse effects, such as sensitivity to the components of the formula, ptosis or any other adverse effect, which in the investigator's opinion should prevent the patient from participating in the study
  13. Subjects presenting myasthenia gravis, Eaton-Lambert Syndrome and motor neuron diseases
  14. Subjects with coagulation disorders or using anticoagulants
  15. Subjects with known systemic autoimmune diseases
  16. Subjects with a history of medical treatment non-adherence or showing unwillingness to adhere to the study protocol
  17. Any condition that, in the opinion of the investigator, can compromise the evaluation of the study
Sexes Eligible for Study: Female
18 Years to 60 Years   (Adult)
Contact information is only displayed when the study is recruiting subjects
Not Provided
Not Provided
Doris Hexsel, CBED
Brazilan Center for Studies in Dermatology
Not Provided
Principal Investigator: Doris Hexsel, MD
Brazilan Center for Studies in Dermatology
November 2009

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP