Succinylcholine Chloride Dihydrate is primarily used in medical settings as a short-acting depolarizing muscle relaxant. It is administered intravenously during surgical procedures or endotracheal intubation to induce muscle paralysis, facilitating easier and safer mechanical ventilation or surgical intervention. Its rapid onset and short duration of action make it particularly useful in emergency situations where quick muscle relaxation is required. Additionally, it is employed in electroconvulsive therapy (ECT) to prevent muscle contractions and reduce the risk of injury. However, its use requires careful monitoring due to potential side effects such as hyperkalemia or malignant hyperthermia in susceptible individuals.