Is wish garden herbal sleepy nights for kids safe to use occasionally?

Safety not known for: herbal products, as well controlled studies have not been done. One ingredient, passion flower, is contraindicated in pregnancy and lactation in drugs.com. Melatonin has been more widely studied and although not approved as a drug, does help regulate sleep cycles and has not been found to have toxicities. Avoid caffeine, high activity and TV, along with reg bedtime rituals seem to work the best.