Unisom at Kroger stores. Prices start at 8.97/32 pack. Ibotta 3/1, KCB 3/1, printable 1/1. Not free, but quite a good deal for those who might use the product.
This deal is also good at Walgreens. They have a store coupon with a digital coupon total of 6 off of 1. They also start pricing at 8.