Several of the most common nootropics include: Piracetam. Aniracetam. Noopept. Modafinil. L-theanine. Alpha-GPC. How do nootropics work? The mechanism of action of nootropics is not fully known. Nevertheless, it's thought they perform by: Increasing the creation of neurotransmitters , such as dopamine and acetylcholine. Improving circulation for the brain. Protecting the mind from damage....