From what I read (IDK what patch you might be using)...it can take a day for the skin to saturate and fill with the medicine.
I also read that the "Fen" type patches, when used as directed for indicated uses, have a relatively low incidence of addiction. The people that use them the wrong way, particularly for the wrong reasons, can get addicted. But they're abusing them.
The point is that these medicines, even if they're opioids, have a purpose. They're made for people in your DH's situation. So lecture him a bit, eh?
Hugs and wishes to you both. I knew he'd use one (EDIT: Or the oxy) when it was really needed. Being to stoic can ruin his days, and who wants to do that? The doctor can adjust the dose if he thinks it is too high.
Also, you may have local hospice services that are paid by insurance, and they can help with this type of thing. You don't have to be alone in this
IF you want help.
Sorry in advance for butting in and being pushy. ((

))