We're building a better ClinicalTrials.gov. Check it out and tell us what you think!
ClinicalTrials.gov Menu

Phone-based Safety Monitoring of Baclofen Prescriptions for Alcohol Use Disorder (BACLOPHONE)

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.
ClinicalTrials.gov Identifier: NCT02596763
Recruitment Status : Unknown
Verified August 2020 by University Hospital, Lille.
Recruitment status was:  Recruiting
First Posted : November 4, 2015
Last Update Posted : August 25, 2020
Région Nord-Pas de Calais, France
Groupement Interrégional de Recherche Clinique et d'Innovation
Information provided by (Responsible Party):
University Hospital, Lille

Brief Summary:

BACLOPHONE is a prospective multicenter cohort study, conducted in two nearby French regions (Hauts-de-France and Normandie). BACLOPHONE consists of the monthly phone-based monitoring of 792 patients during their first year of baclofen prescription for alcohol use disorder.

The main objective of the study is to determine the rate of patients who stop baclofen due to an adverse event (AE) in the first year of treatment.The BACLOPHONE study also aims to determine which types of AEs and serious AEs are actually liable to baclofen, and which other types are more likely the consequence of confounding factors, e.g., concomitant alcohol, psychotropic medications or substance uses, and comorbidities.

Condition or disease Intervention/treatment Phase
Alcohol Use Disorder Drug: Baclofen Phase 4

Detailed Description:

Inclusions are performed by any previously-labeled baclofen-prescribing physician in the Hauts-de-France or Normandie French regions.


In the 15 days following the inclusion, participants will receive two successive phone calls. The first call will be performed by a physician investigator of the study who will: re-explain the principles of the study to patients, check the absence of non-inclusion criteria, and note the medical history, date of baclofen initiation and current dose, undergoing medications and current doses, occurrence of AEs since the initiation of baclofen, birthdate, weight, and height. The physician will also check whether specific safety elements important with regards to the baclofen treatment are noticeable in the patient: history of seizures, suicide, and other concurrent substance use. The second phone call is performed by a clinical research associate (CRA) who will check the absence of non-inclusion criteria, and collects the 30 last-days reported alcohol use according to alcohol timeline follow-back (A-TLFB) method, date of initiation and current dose of baclofen, severity alcohol dependence questionnaire (SADQ), alcohol use disorder identification test (AUDIT), and A-B neuropsychological assessment schedule (ABNAS) which scores the current level of sedation in patients with psychotropic drugs.


During the subsequent one-year follow-up, two types of phone interviews are performed: 1) Monthly Standardized Interviews (MSI). MSIs consist in collecting the previous-month daily use of alcohol using the A-TLFB, the daily dose of baclofen across the previous month, the current ABNAS sedation score, any change in any associated medication, any change in any substance use, and any AE reported by the patient. No predefined list of AEs is used, as the investigator only asks the patient if he/she has noticed or experienced any unexpected symptoms of health issues since the last call. The daily dose distribution of baclofen, i.e., hours and doses of baclofen intakes, are also systematically investigated in the patient. The average subjective level of craving for alcohol is self-scored by the patient using a 0-10 verbal rating scale (i.e., 0 for no craving at all, to 10 for the most severe possible craving). The daily hours of maximum craving is also noted.

2) Semi-standardized Pharmacovigilance Interviews (SPI) which are unscheduled, and are performed in the case of an AE reported by the patient to the CRA, or in the case of a direct phone call to the pharmacovigilance center by the patient or their baclofen prescriber, with the aim to report an AE. Data collected are: current baclofen dose and recent changes in baclofen dosing, recent and current drinking patterns, associated medications, type of AE, 'serious' feature of the AE according to the definition of the Food and Drugs Administration, onset date and occurrence conditions. Patients can be secondarily re-contacted to assess the final outcome of the AE, and to determine the causality score of baclofen regarding the AE, using both the French causality method and the Naranjo's algorithm if applicable.


If baclofen is stopped for any reason during the year following the initiation, a last phone interview will be conducted by the CRA 3 months after baclofen cessation.

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 792 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Other
Official Title: Phone-based Safety Monitoring of the First Year of Baclofen Treatment for Alcohol Use Disorder: the BACLOPHONE Cohort Study
Study Start Date : December 2015
Estimated Primary Completion Date : January 2022
Estimated Study Completion Date : January 2022

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Alcohol
Drug Information available for: Baclofen

Arm Intervention/treatment
Patient with current alcohol use disorder included by any baclofen prescriber located in the French region of Nord - Pas-de-Calais - Picardie.
Drug: Baclofen
Patient receiving an off-label baclofen treatment for alcohol use disorder for less than 1 month.
Other Name: Agonist of GABA B receptors

Primary Outcome Measures :
  1. Discontinuation of baclofen because of an AE [ Time Frame: First year of treatment ]
    The link between AE and the discontinuation of baclofen will be defined by the results of the analysis of the pharmacovigilance team. the one-year probability (with it 95% confidence interval) of baclofen discontinuation due to the occurrence of an AE will be estimated using the Kaplan-Meier method. Drop-outs, death, or baclofen discontinuation for other reasons than an AE will be treated as censoring events. A sensitivity analysis treating death or baclofen discontinuation for other reasons than an AE as competing risk will be performed using the approach of Kalbfleisch and Prentice.

Secondary Outcome Measures :
  1. Frequency of the different types of AEs and SAEs occuring on baclofen [ Time Frame: First year of treatment ]
    The AEs will be identified and reported by the "Monthly Standardized CRA Phone Interviews" and by the "Unscheduled pharmacovigilance Phone Interviews".

  2. Relationship between the occurrence of the first sedative AE and alcohol and baclofen dosing [ Time Frame: First year of treatment ]
    To determine whether there is an association between the occurrence of baclofen-related sedation and the concurrent doses of baclofen, alcohol and psychoactive drugs. , bivariate and multivariate time-varying Cox's regression models will be used to assess the impact of doses of baclofen and alcohol on occurrence of first sedative AE by using available exposition measures.

  3. Causality of baclofen in the occurrence each AE [ Time Frame: First year of treatment ]
    To determine the causality of baclofen in the occurrence of each AE, using the French method for assessing causality, and the Naranjo's algorithm (if applicable). For each AE, the determined causality of baclofen will thus be "doubtful", "possible", "probable", and "definite"

  4. Proportion of patients whose prescription meets the official prescription requirements of the Temporary Recommendation for Use (TRU) [ Time Frame: First year of treatment ]
    This proportion of patients will be calculated from data collected during "Monthly Standardized CRA Phone Interviews", based on whether the patient has received the official TRU document which should systematically be given together with the prescription

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   18 Years to 80 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Aged 18 or more and under 80 years
  • Receiving an off-label baclofen treatment for alcohol use disorder for less than 15 days
  • Mentally and physically able to participate in telephone interviews
  • Reachable by phone
  • Living in the Hauts-de-France or Normandie French regions
  • Beneficiary of a health insurance plan
  • Informed and signed consent before the beginning of the study.

Exclusion Criteria:

  • Baclofen prescriber not registered as investigator or not previously labeled for receiving consent, or not located in the regions of Hauts-de-France or Normandie
  • Patient with ICD-10 criteria for other substance dependence (except tobacco) in the past three months.
  • Patient not reachable by phone or unable to correctly understand the French language
  • Pregnancy or breastfeeding.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02596763

Layout table for location contacts
Contact: Benjamin ROLLAND, MD,PhD benjamin.rolland@chru-lille.fr

Layout table for location information
Hospital Center Recruiting
Abbeville, France, 80100
Contact: Maroussia WILQUIN, MD         
Centres de Soins, d'Accompagnement et de Prévention en Addictologie (CSAPA) Le Cèdre Bleu Recruiting
Armentières, France, 59280
Contact: Marie-Christine BLANQUARD, MD         
Hospital Center Recruiting
Arras, France, 62000
Contact: Dominique LEJEUNE, MD         
Service d'Aide aux Toxicomanes (SATO-Picardie) Recruiting
Beauvais, France, 60000
Contact: Jean-Jacques PIK, MD         
Hospital Center Recruiting
Boulogne, France, 62200
Contact: Frédéric TEISSIERE, MD         
University Hospital of Caen Not yet recruiting
Caen, France
Contact: François VABRET, MD, PhD         
Contact: Nicolas CABE, MD         
Hospital Center Recruiting
Carvin, France, 62220
Contact: Hugo FAVRE, MD         
Hospital Center Recruiting
Clermont, France, 60600
Contact: Sophie VELASTEGUI, MD         
Hospital Center Recruiting
Dunkerque, France, 59300
Contact: Cécile RICHEZ, MD         
Hospital Center Recruiting
Ham, France, 80400
Contact: Michel SOCHALA, MD         
Hospital Center Recruiting
Hazebrouck, France, 59190
Contact: Lucie MOLMY, MD         
Hospital Center Recruiting
Lens, France, 62300
Contact: Christelle DUBOCAGE, MD         
Etablissement Public de Santé Mentale (EPSM) Recruiting
Lille, France, 59000
Contact: Véronique VOSGIEN, MD         
Hospital Center Recruiting
Roubaix, France, 59100
Contact: Laurent URSO, MD         
University Hospital of Rouen Not yet recruiting
Rouen, France
Contact: Alexandre BAGUET, MD         
Hospital Center Recruiting
Saint Pol sur Ternoise, France, 62130
Contact: Dominique LEJEUNE, MD         
Hospital Center Recruiting
Saint-Amand-les-Eaux, France, 59230
Contact: Charles LESCUT, MD         
Hospital Center Recruiting
Tourcoing, France, 59200
Contact: Laure SPINOSI, MD         
Hospital Center Recruiting
Valenciennes, France, 59300
Contact: Alexandre BONORD, MD         
Sponsors and Collaborators
University Hospital, Lille
Région Nord-Pas de Calais, France
Groupement Interrégional de Recherche Clinique et d'Innovation
Layout table for investigator information
Principal Investigator: Renaud JARDRI, MD, PhD CHRU de Lille
Layout table for additonal information
Responsible Party: University Hospital, Lille
ClinicalTrials.gov Identifier: NCT02596763    
Other Study ID Numbers: 2014_45
2015-002977-40 ( EudraCT Number )
PHRCI_2015 ( Other Identifier: PHRC number, DGOS )
First Posted: November 4, 2015    Key Record Dates
Last Update Posted: August 25, 2020
Last Verified: August 2020
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No
Keywords provided by University Hospital, Lille:
Off-label prescription
Additional relevant MeSH terms:
Layout table for MeSH terms
Alcohol Drinking
Drinking Behavior
Alcohol-Related Disorders
Substance-Related Disorders
Chemically-Induced Disorders
Mental Disorders
Muscle Relaxants, Central
Physiological Effects of Drugs
Neuromuscular Agents
Peripheral Nervous System Agents
GABA-B Receptor Agonists
GABA Agonists
GABA Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action