A clinical study by Cephalon Pharma showed that Hydrafinil exhibited a 139% increase in wakefulness over Modafinil.

Fluorenol (9-Fluorenol)

Hydrafinil, also known as Fluorenol or 9-Fluorenol, is a synthetic eugeroic that is more effective than Modafinil.

It is a weak dopamine reuptake inhibitor, being notably 59% more vulnerable than Modafinil albeit being a stronger eugeroic, resulting in a lesser liability for addiction.

Fluorenol has shown enhancements in short-term visual memory, attention, and information processing, decreased impulsivity and increased logical thinking.