What is basically advised as maximum treatment plan would be
-Nizoral or Neutrogina T-Gel shampoo,
-Rogaine 5%+Azelaic Acid,
-5alpha-reductase Type I inhibitor such as Propecia (or Proscar (off-label) cut in pieces) or Avodart (off-label)which blocks both types of 5alpha-reducatase (Type I and II) but is not yet approved for MPB (the marketing analysis implied that the cost to show effectiveness in studies and the difficulty to demonstrate differences in the mind of consummers between Avodart and Propecia would be too great and not generate enough revenues (because its the same companie that makes both compounds they would only be taking protifs from the Propecia line to the Avodart line even if pilot studies seem to imply that Avodart (dutasteride) was a lot more effective at reducing DHT and stopping/reversing MPB.
Hope some of this helps,
Rogaine is supposed to offer some initial results which eventually go away as time goes on. A 5 alpha-reductase inhibitor can have some sexual side effects (that usually resolve with time) and some gyno in some men. It also increases plasmatic testosterone upwards to 10% if I remember correctly.
But then again, its the only really effective therapy medicine has too offer that seem to be effective with little observance problems like Rogaine.
Saw Palmetto for the moment has little evidence behind it of effectiveness, an being a natural product, you actually have no idea of what amount of active ingreadient there is in it, which might be up and down as a function of batches or might simply not be in sufficient quantity to block the enzyme to reduce your DHT levels sufficiently to stop/reverse MPB.