Dan, I'm not trying to hijack your post (my apologies) but I wanted to pop on to add this.
For anyone considering minoxidil for beard growth, pay the tiny extra bit of cash for the foam.
I'd been using the oily dropper version for three weeks prior to today. It set my face on fire (no rashes, swelling or lasting effects so much as a pain in the ***) for a good 10-15 minutes after application every time and took forever to dry. This was a problem at night when I applied it before bed and wanted nothing more to roll over onto my side to pass out but couldn't.
Granted, it already has given me a ton of results, but between the pain and wetness it was driving me nuts. I finally bit the bullet and went back to Target to pay the ten extra bucks (20 for oil, 30 for foam) that I should've paid in the first place.
No burning, pretty much zero drying time and my face doesn't feel dry or flaky at all.
Even if you're not sensitive to the propylene glycol in the oil like I was, the foam is worth it for the drying time alone.