Safety Extension Study of TRO19622 in ALS

Inclusion Criteria: * Patients must have completed the 18-month safety and efficacy study of TRO19622 in Amyotrophic Lateral Sclerosis (ALS) patients treated with riluzole (Protocol TRO19622 CL E Q 1015-1). * Both the investigator and the patient will decide based on previous good tolerance and other clinical grounds whether or not to participate to the open-label extension. * If patients were on anti-vitamin K during the double-blind period, when entering the open-label extension, coagulation tests should be monitored in exactly the same conditions as if a new anticoagulant treatment was initiated and the dose of anti-vitamin K should be adjusted accordingly. * Patients enrolling from this prior safety and efficacy study must: * If female of childbearing age of potential, continue to use adequate birth control methods and have a negative serum pregnancy test at the preceding double-blind protocol termination visit. Male and female partners must agree to use an effective method of birth control during their participation in the trial and for at least 15 days after the last IMP dose. Both partners must use reliable methods of contraception with 2 independent methods. The following measures are acceptable: Hormone contraceptives (e.g. oral contraceptives or comparable methods), intrauterine device, condoms with spermicidal coating or in combination with spermicidal creams, total abstinence or sterilisation performed in the past. * Be able to follow the investigator's instructions and be able to comply with the visit schedule and visit requirements; and * Sign a written informed consent. Exclusion Criteria: Patients may not participate in this study if they have an ongoing, unresolved, clinically significant medical problem (including patients having experienced serious adverse events or non-serious, but medically significant adverse events during the preceding safety and efficacy study that was assessed to be related to the study medication by the investigator) that in the judgment of the investigator would make it unsafe for the patient to participate in the trial.