I have never been able to do this with 13 years of using Couvre since very difficult at night to do (ie wash entire scalp off--pain sometimes, have to shower) so I hope it still penetrates. I know the alcohol penetrates since I get some irritation sometimes from the minoxidil.
No studies have been done on this. I'd apply dermmatch 30 minutes after topicals. I'm sure you'd get at least a little absorption though even if it is already on.
I have the same question. It's hard enough to take a shower then apply minoxidil when you get in late not to mention if I come home smashed (then forget about it, a shower is definitely not happening). Sure there's some toppik on the scalp but it's not pasted on. Has anyone had success using minoxidil without washing out the toppik?