Acute inflammatory demyelinating polyradiculoneuropathy is an immune-mediated polyneuropathy (AIDP) that manifests in the form of an acute, ascending, areflexic, progressive and symmetrical paralysis. The primary infection usually from the respiratory or gastrointestinal tract and can be bacterial or viral, and during the pandemic SARS -COV2 and COVID-19 vaccine may also lead to it Life-threatening complications can occur as a result of Acute inflammatory demyelinating polyradiculoneuropathy Syndrome, such as: Severe Autonomic Cardiovascular Dysfunction and respiratory distress. We will report cases who were admitted to the ICU at Lamine Debaghine hospital between 2018 and 2023 presenting major complications and their evolution under ICU ward assistance. CATEGORY: Resuscitation and Anesthesia, Emergency Medicine KEYWORDS: Acute inflammatory demyelinating polyradiculoneuropathy syndrome, dysautonomia, ICU, AIDP, Guillain-Barre.