Tranquil Sleep® Extra Strength by Natural Factors $55.00 60 chewable tablets - $55.00 Size 60 chewable tablets 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Tranquil Sleep Extra Strength formula is a unique combination of compounds that support relaxation and enhance natural sleep quality.* In a tasty, tropical fruit-flavored chewable tablet. Also available in Regular Strength.