They seem to work

I've been using them nightly for a few nights now, they do seem to work, even when I removed them from the 1st night of using them the patches turned black, I will say after I removed them though they stunk to high heaven! So if you've got a sensative nose, or sensative stomach, it's something you'll want to consider when using them. Overall I am happy with the product, they were simple to use, stayed on well all night, even though I move around a lot, and rub the soles of my feet against my legs while I'm asleep, they stayed put and didn't come off.