Aussie,

You are not crazy, as some patches DO have to be worn over your painful areas. Lidocaine and Capsaisan patches are worn wear it hurts.

Fentanyl, which is a major league pain killer is worn on a muscled area, such as arm or leg, and is not to be heated up such as with a heating pad. Fentanyl is aborbed by your skin and works systemically. Kids and pets can be poisoned by chewing the patches! Like any pill, they must be kept away from kids and pets. I have been on fentanyl. I am not anymore. My choice.

I pm'd you. Autonomic neuropathy makes things more complex.