Buy Provigil online contains Modafinil, a very popular drug prescribed to patients lacking concentration like in ADHD, and narcolepsy. It primarily blocks dopamine reuptake at the neuronal synapse resulting in increased concentrations of the dopamine neurotransmitter, similar to amphetamines and cocaine. It's true that the pills may help you through the night in an attempt to perk up your concentration. Few researchers did point out that data retention did improve in a few cases, but not in all of them. And in most of the subjects with data retention, very few of them showed it after the drug has left the system. Greater the IQ, the lesser Provigil tends to help in terms of memory.