I'm worried that I can't study without taking prescription drugs. I'm not sure I can pass my tests without them.
How do the drugs help you study?
They really help me focus and I can remember the material better.
If you have trouble studying and need drugs to help that is fine. However, you need to be careful to not get addicted and use them for the wrong purpose.
I think I may already be addicted to them.
Talk to your doctor and see what they recommend. They may have a way to reduce the dosage over time and you can adjust your study habits during this time. If you think you're addicted, mention that to your doctor as well.