armodafinil Get Now Armodafinil is the R-enantiomer of modafinil, which means it is one of two mirror-image forms of the compound. The R-enantiomer is believe to be responsible for most of modafinil’s wakefulness-promoting effects. It works by influencing several neurotransmitter systems in the brain, particularly dopamine, norepinephrine, and histamine pathways, [...]