This study focuses on Amyotrophic Lateral Sclerosis, a rare disease that affects the nerve cells in the brain and spinal cord. This condition can lead to difficulties with muscle control, movement, and speech. The purpose of the study is to evaluate how the drug pridopidine affects the progression of this disease.

Participants in the study will be given either pridopidine in a capsule form or a placebo. The study uses a double-blind method, which means that neither the participants nor the researchers know who is receiving the active medication or the placebo during the course of the trial. This is done to ensure the results are as accurate as possible.

During the trial, participants will be monitored over a period of time to observe changes in their physical abilities and overall health. This includes tracking how well they can speak and their ability to breathe effectively. The study also monitors any side effects or changes in health to ensure safety throughout the process.