The Starter Kits last 5-7 weeks and refills are reasonably priced at 25-35 dollars per product.  Once a patient is completely clear, I tell them in the office that they will likely need some type of continued prevention with either some or all of the products.  Surprisingly, some patients will completely extinguish their acne and no longer need any special products at all after they complete this program.  It depends how stubborn the case is.