Mine are the Sandoz patches, but luckily I don't have issues with rashes... maybe a bit of dry skin in the area but since I go back and forth, it normally clears up after a day or two so by the time I go back to that side the next week, it's good.
And I tend to put mine on my hips / butt
By the way, I just put on my first dual patch dose a moment ago.
I think, in the most un-feminine way possible to describe it, adding the second patch felt very much like Thanos adding another infinity stone to his gauntlet.
(Sorry, not sorry! 😉😂)