As symptoms gradually improve, you should try reducing the amount of Banjo you use.
One reason to do so is that by using less Banjo, you’ll save money. Another reason is that your goal, with any medication, should be to use only what’s required to achieve the desired outcome.
The ultimate goal is to reduce symptoms to zero and then entirely discontinue Banjo – without the return of symptoms. That might not always be possible, but it’s the goal.