As an update, I've been using 5% minoxidil and 0.25% finasteride from my pharmacy. I've used 2 bottles so far, and each one left a white crusty residue on the bottom of the bottle after a few days or weeks. I'm guessing that's the finasteride separating itself from the rest of the solution. So, I feel like this might be worse than just using the MinoxidilMax formula. Then again, the MM bottles are solid and you can't really see into them very well, so maybe that was happening with theirs too. Really not sure what I should do going forward.