It was meant to happen that if you stop your treatment you will start loosing hair again. Any non-surgical treatment that you use to stop hair loss has to be continued for life in order to be effective. If is the case that you don't want to take medication anymore, you can always look at other options such as PRP (Platelet Rich Plasma). We have been using PRP for quite a while and obtained great results in our patients.
Best of lucks