Proxiphen for acne - to be perfectly blunt, a very silly idea IMHO.
For one thing it's incredibly expensive for acne, a face is much larger than some temples. For another the only thing I can think of in it which would really help could be the spironolactone, and you could use that separately anyway for _much_ cheaper. Also, spironolactone for acne is stepping into the unknown as it is. Though I'm keen to experiment with it alone. Check out my thread in the experimental section on spironolactone as a facial cream for acne.
Perhaps the copper peptides might work on the face for wrinkles in a similar way as they do for hair loss, but who's to say they do, or if they would have any action on acne?
But it's got 3 other growth stimulants - minoxidil, NANO and phenytoin... so it will probably just make your face hairy! Not to mention how people complain about minoxidil causing water retention in their face when applied to their head, let alone their face!
Also, even if your strange theory about the immune response is correct and it's the same as in acne, what on earth made you think of proxiphen? I know Dr P thinks this response is important in male pattern baldness, but to my knowledege there certainly aren't any immuno suppressants in proxiphen.