Side effects can include drowsiness, dizziness, weakness, and fatigue. Dantrolene (Dantrium) is a skeletal muscle relaxer used to treat muscle spasms caused by spinal cord injury, stroke ...

A diagnosis requires these three core symptoms: Severe fatigue for 6 months or longer ... or fuzzy thinking Orthostatic intolerance, or dizziness when you stand or sit upright that eases when ...