I'm a college student, i have an exam tomorrow and i still got a lot to study i do take some smart drugs to help me it is called modafinil (bravamax) i took 2 bills this morning (400mg) is it ok to take like 3 more to make me awake to the next day?

Taking medications to stay awake as a crutch to study is not a good idea. Take a short nap, eat a healthy meals all day and go for a walk after studying for a few hours. Do some exercises every 4-5 hours between studying. Keep yourself mentally alert and don't hooked on drugs.

Sorry to break your bubble, but there is no such thing as a "smart drug", and prescription modafinil is used to enhance alertness, focus, and concentration in folks with sleep disorders. Appears you are planning to overdose yourself which may backfire severely. Suggest a far better approach by heeding previous advice from my colleague.