Natrol. Natrol Melatonin Fast Dissolve, made with 99% Pure Melatonin is a drug-free sleep aid that's fast-acting, dissolves quickly in the mouth with no water needed; Available in 1mg, 3mg, 5mg and 10mg formulations. Clean Ingredients: Natrol Fast Dissolve Melatonin is 100% Drug-Free, non-GMO and vegetarian. Free of artificial flavors, sweeteners and preservatives, and synthetic dyes. Convenience: Natrol’s unique fast-dissolve formula enables fast absorption and can be taken anytime, anywhere; No water needed. Melatonin Benefits: Melatonin can help reset your body’s natural sleep cycle, so you can fall asleep faster and stay asleep longer. Natrol is the #1 drug-free sleep aid brand and has been ranked #1 in consumer satisfaction for 3 years in a row.