This is a homeopathic medicine, sometimes called a "cell salt" because it's actually a nutrient found in body cells.
As a homeopathic remedy, it can help people who have mental fatigue, irritability, restlessness
, startling from noise, and hypersentitivity to all stimuli. When there's great exhaustion
and mental dullness, combined with nervousness
and oversensitivity, it's one to consider.