Dantrolene is a medication primarily used to treat muscle spasticity and to manage malignant hyperthermia, a severe reaction to certain anesthetics. It works by inhibiting calcium release from the sarcoplasmic reticulum in muscle cells, leading to reduced muscle contraction and relaxation of the muscles. Dantrolene is available in both oral and intravenous forms. It is important for patients to follow their healthcare provider's instructions when using this medication, as it can have side effects, including drowsiness, dizziness, and gastrointestinal issues. Regular monitoring may be necessary to ensure safety and effectiveness.