This dietary supplement is a combination of valerian root, passionflower, and magnesium. These ingredients may reduce muscle spasms but do not normally cause drowsiness. These ingredients may also cause a calming effect and can be used at bedtime to help you fall asleep. These ingredients are non-addictive and will not cause a morning hangover effect. This product contains no yeast, wheat gluten, soy protein, milk/dairy, corn, sodium, sugar, starch, artificial coloring, preservatives, or flavoring.