For those who are interested in UK to purchase Modalert, it is worth noting that this belongs to the group of central nervous system stimulants that doctors prescribe for the management of a number of sleep related issues. The list of approved uses of Modalert does not include off-label uses where the treatment has seen success as a study drug or cognitive enhancer. The drug is sold over the counter via prescription in 200mg tablets and is a brand of the well-known cognitive enhancer modafinil.