It is unstable, but you can make weekly batches in a non-aqueous solution.Isn't minoxidil sulfate powder pretty unstable? I thought there were issues around mixing that yourself.
Also, VPA is interesting, but is the topical on the market? I thought it was just an oral medication.
VPA raw powder is very cheap, you can make the topical yourself. People have been using it for at least ten years on the forums.
