From Wikipedia:

Nootropics (pronounced /noʊ.ɵˈtrɒpɨks/), also referred to as smart drugs, memory enhancers, and cognitive enhancers, are drugs, supplements, nutraceuticals, and functional foods that are purported to improve mental functions such as cognition, memory, intelligence, motivation, attention, and concentration.

The word was first coined by Corneliu E. Giurgea in 1972. He stated that nootropic drugs should:[4]

1. 1.Enhance learning and memory
   

2. 2.Enhance the resistance of learned behaviors or memories to conditions that tend to disrupt them (e.g., electroconvulsive shock, hypoxia)
   

3. 3.Protect the brain against various physical or chemical injuries (e.g., barbiturates, scopalamine)
   

4. 4.Increase the efficacy of the tonic cortical/subcortical control mechanisms
   

5. 5.Lack the usual pharmacology of other psychotropic drugs (e.g., sedation, motor stimulation), and possess very few side effects and extremely low toxicity
   

From http://nootrops.blogspot.com/:

Nootropic drugs, popularly referred to as "smart drugs", are substances which boost human cognitive abilities (the functions and capacities of the brain). The word nootropic is derived from the Greek words noos or "mind" and tropein meaning "to bend/turn." Typically, nootropics are alleged to work by increasing the brain's supply of neurochemicals (neurotransmitters, enzymes, and hormones), by improving the brain's oxygen supply, or by stimulating nerve growth.

We’ve chosen products which are extraordinary...not commonly stocked by health food or vitamin stores, and which have been shown effective in studies, and are widely used by physicians and laypersons interested in cognitive health and performance. Though our products are sold as over-the-counter nutritional supplements, and as such are not subject to US FDA oversight, many have been extensively studied, have been available, and used for many years within and outside the USA.

Doctors in the European Union (EU) and Eastern Europe have been  prescribing Nootropics for years to mitigate brain trauma, and to treat patients with memory, learning, and attention problems. Most of our products have been in use for decades, all are very safe, and all are currently available without prescription.