There is a huge difference between
someone addicted to
speed (meth, etc) and someone who has ADHD and is taking the prescribed amount of the medication. You can literally sto
p and start it any time. The only effect is that you go back to
the feeling you had before going on the med. So, in your case, there should be nothing to
worry about. You could sto
p it to
morrow, go off it for a few days, go back on it, etc. Many adult users can use it on an only "as needed basis".