I take Rubifen 20mg which are 20mg IR methylphenidate tablets. I take it in 40mg orally doses and occasionally I snort 20mg doses. With Rubifen I have taken 9 caps of guarana extract that is 90mg caffeine and too teofiline and theobromine. I have 50mg pregabalin caps. I have taken one cap but I don't know if a high dose of pregabalin can be good for my drugs intake.