RU58841 is a completely experimental treatment for Androgenetic Alopecia, so if you decide to use it, you're on your own.
--------
I just started using a 10% solution of the treatment applying it all over the top of my scalp in a Norwood 6 pattern since that's how I'm thinning. I really cannot say much how well it works since I currently haven't been on it for a very long time. About how long it should last, it depends how much you use. It seems like most people tend to use a 5-7 percent solution, I myself went for using a 10 percent solution since my male pattern baldness is very aggressive. Since it currently says in your regimen that you're taking Finasteride, you shouldn't need to use a very high solution of RU58841, probably 5 percent maximum if your male pattern baldness isn't very aggressive and you're responding well to Finasteride.
For the percentages of the solutions, you would usually measure how many milligrams per milliliters. For example, if you want to use a 5 percent solution, use 50 milligrams per 1 milliliter. For a 10 percent solution, use 100 milligrams per 1 milliliter, so on and so forth. For what vehicle to use, most like to use a ratio of 70/30 using Ethanol and Propylene Glycol. For dosing, apply to the areas where needed that are prone to balding, so that will also depend on how much will need to be used.