you’re joking arent you?
ok its true they cant add anything to the patent. But they dont want to add anything to it. They issued it to prevent existing owners of the drugs to legally start their hair business. thats all.
Now if they develop a new drug, they have monopoly on it protected & enforced by FDA and no one can market or sell generic equivalents for a decade or so and thus have a full controll over pricing (they sell the drug and anyone can do the procedure, their fee is included in the price of the drug)
While if they use existing drug, someone else can market and sell existing drug and they cant. They cant control whose doing the procedures and they cant enforce license fees because they are not selling anything themselves to the doctors who perform the procedure.
development of a new drug is not illegal. the patent prevents the current owners and manufacturers of the existing drugs from starting their own hair business – thats a logical step. Next logical step is to either go with their own drug go through trials, gain FDA approval, market it, and have monopoly on its selling. Or alternatively, license one of the existing drugs from its actual owner. Whichever of these two options will look more lucrative to the investors.
First option - their own drug - harder trials but true monopoly on the procedure controlled through the drug sales and virtually no money leaking into someone elses pockets.
Second option - possibly faster approval, but substantial amount of revenues goes to someone else and whats worse, pricing of the drug has been already made. So while they can put it into a new box, and set the price super high, they will never be able to prevent doctors from using the existing drug name instead of the more expensive pockage and name brand marketed for hair regrowth. Result thus would be that for all the money they would spend on marketing they would get substantial amount of money ending in the other companys pocket for both the current and new name brands of the drug, and another bunch of money leaking into doctors pockets whenever the doc charges the patient full price but uses the cheaper version of the drug to fill a hole in his pocket. In the later case, follica would get no money at all. just doctor & the original owner of the drug would benefit.