Provigil, the brand name of the drug Modafinil, is unfortunately illegal to import without a prescription in the United States. [1]
And strange side effects listed... "PROVIGIL may cause you to have a serious rash or a serious allergic reaction that may result in hospitalization or be life-threatening. If you develop a rash, hives, sores, swelling, or trouble swallowing or breathing, stop taking PROVIGIL and call your doctor right away or get emergency treatment." [2]
Lastly, more side effects: http://www.google.com/search?hl=en&q=provigil+more:drug_...
Interesting drug. Sounds great, but I wouldn't take it, though.