Within the first 30 seconds I notice my heart pounding (which I understand is something Adderall does.) I haven't had good results every time I have used it, but when it did work I found myself EXTREMELY focused. I used it, ironically, to complete a paper I was writing on Adderall(The chemical drug.) I have never used the chemical Adderall, but after all the research I did for my paper I feel this Digital Dose seemed to match the real thing very well. I also had trouble going to sleep one night I dosed at 7pm, another common effect of Adderall.