Modafinil
"The first time I took this (prescribed for obstructive sleep apnea) I thought "wow, this is the answer!" I was awake and alert but didn't feel drugged....I felt "on the ball" and I hadn't felt like that in forever. The second time I took it I felt extremely tired. I forced myself out of bed but felt extremely depressed and anxious. I took anther tablet not realizing I was having a negative reaction to this drug. I became so tired I stayed in bed all the next day. I felt disorientated and it was as if everything was in slow motion. I could not get out of bed and was more tired than I had ever been in my life. My heart beat was fast and it felt irregular. I started to have negative thoughts and hallucinations. Not good!!!"