"I seriously do not know how this medicine is approved as a stimulant. I suffer from obstructive sleep apnea, narcolepsy, and shift work sleep disorder. This medicine in no way kept me awake, alert, or focused. If anything I had a complete opposite affect. I felt some sort of brain fog, my performance at work lagged, and I couldn&#039;t keep my eyes open. I had no motivation to accomplish any tasks, or get out of bed for that matter. Along with these negative effects I had headaches and nausea. I would not recommend this as a stimulant or something for sharp cognitive effects. But, maybe more like a sleeping pill. I felt like it was a sleeping pill, but struggling to stay awake after taking it. Tried for 1 week."