Taking Modafinil after a concussion

Hi everyone,

I'm a college student who takes 100 mg of Moda 1-2 times a week. Last Sunday I got a mild concussion and I've mostly been resting since then. When would it be safe to take Moda again? I have a lot of work to catch up on and I'm tempted to take some this weekend.

EDIT: Sounds like I should stay a way for a while during my recovery. When would it be a good idea to start taking it again?