So you're moving on from alcohol and pot to this?
Modafinil may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:
difficulty falling asleep or staying asleep
loss of appetite
tight muscles or difficulty moving
uncontrollable shaking of a part of your body
burning, tingling, or numbness of the skin
difficulty seeing or eye pain
Some side effects can be serious. If you experience any of these symptoms, call your doctor immediately:
difficulty breathing or swallowing
swelling of the face, throat, tongue, lips, eyes, hands, feet, ankles, or lower legs
fast, pounding, or irregular heartbeat
frenzied, abnormally excited mood
hallucinating (seeing things or hearing voices that do not exist)
thinking about killing or harming yourself
Nothing like subbing one (or two) vices for another.