If you stop testosterone therapy before your prescribed program, you would slip back to having low testosterone symptoms for the same reason why you were prescribed the therapy in the first place. Once you have successfully completed your course of testosterone therapy, you will be evaluated to see if you need to continue. Usually once you begin testosterone therapy, you would stay on it, unless otherwise directed by the prescribing physician.
If you do not need to take a “break” from your testosterone therapy, maintaining the proper diet, exercise and other lifestyle counseling, will help you to keep your testosterone levels as high as possible and sparingly maintain the improvements you have made.