So yesterday i took 40mg of focalin (IV) over a period of 3 hours. Ive took focolin before,but dont do it regularly (its prpnanly been about 5 months since the last time) the comedown is pretty bad. Wasnt to bad last night but now i have a weird head rush/headache and slight nausea. When will these effects fade? Last pill i crushed was probably around 4pm yesterday, and its 10am the next day.