I ALWAYS check out the possible side-effects first.
Below is some info I got on Google:
What are the possible side effects of modafinil (Provigil)?
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Stop using modafinil and call your doctor at once if you have any of these serious side effects:
fever, sore throat, headache, and vomiting with a severe blistering, peeling, and red skin rash;
bruising, severe tingling, numbness, pain, muscle weakness;
easy bruising or bleeding;
white patches or sores inside your mouth or on your...
What are the precautions when taking modafinil (Provigil)?
Before taking modafinil, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
This medication should not be used if you have certain medical conditions. Before using this medicine, consult your doctor or pharmacist if you have: a certain heart problem (left ventricle thickening), a history of previous reaction (e.g., chest pain, irregular heartbeat) to stimulants.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: high blood pressure, heart problems (e.g., chest pain, heart attack, heart valve problem), liver problems, kidney problems,...
Better safe than sorry . . .
"Wiz"