With such a wide variety of treatment options and the use as a doping agent, Provigil is on the prohibited list via the World Anti-Doping Agency, which means that athletes cannot test positive for its use. modafinil online Provigil is a powerful prescription medication that is indicated in the treatment of narcolepsy, shift work sleep disorder, and day time sleepiness that is caused by sleep apnea. Side effects associated with Provigil may include insomnia, agitation, anxiety, aggressiveness, confusion, tremor, sleep disturbance, nausea, and diarrhea. Most patients will not experience these side effects but those who do will usually find that they are self limiting and will dissipate on their own before the symptoms are bothersome enough to discontinue the medication.