Consult your health professional prior to use if you are pregnant or breastfeeding. Consult your health professional if symptoms persist or worsen. Consult your health professional if sleeplessness persists continuously for more than 3 weeks (chronic insomnia). Consult your health professional prior to use if you are taking carbidopa or drugs/ supplements with serotonergic activity. These may include, but are not limited to, L-tryptophan, S-adenosylmethionine (SAMe), St. John's wort, antidepressants, pain killers, over the counter cough and cold medication containing dextromethorphan, anti-nausea medication and anti-migraine medication. Some people may experience diarrhea, nausea, vomiting and abdominal pain. Discontinue use and consult your health professional if you show signs of weakness, oral ulcers, or abdominal pain accompanied by severe muscle pain or if you experience skin changes. Do not use if you have scleroderma. Some people may experience drowsiness. Exercisecaution if operating heavy machinery, driving a motor vehicle or are involved in activities requiring mental alertness. Keep out of reach of children. Do not use if security seal inside the cap is broken. Store tightly sealed in a cool, dry place.