Armodafinil (Nuvigal)is the active isomer of modafinil (Provigil).As such,you would not be surprised to discover that,compared to modafinil,Nuvigal is:

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Armodafinil (Nuvigal) is the active isomer of modafinil (Provigil), which means it contains only the R-enantiomer while modafinil contains both R and S enantiomers. Studies have shown that armodafinil is twice as potent as modafinil, with higher plasma concentration and longer duration of action. Therefore, compared to modafinil, Nuvigal is twice as efficacious.

Armodafinil (Nuvigal)is the Active Isomer of Modafinil (Provigil)