Do not use during pregnancy or breastfeeding. WARNING - Valerian may harm the liver in some people. If you experience yellowing of the skin/eyes, dark urine, nausea, vomiting, unusual tiredness, weakness, abdominal pain, and/or loss of appetite, stop using this product and see your doctor. If symptoms persist, talk to your health professional. May cause sedation and drowsiness, caution when driving and operating machinery. Always talk to your health professional before taking multiple products to support sleep.