Your heart only beats so many times and then it stops permanently. We all have different tolerances to drugs. If you go to the search box at the top of this page and type in
ritalin, then click on the drug search button you will find all the information you need about serious ritalin side effects and danger signs for overdose. I suggest you check it out for your own benefit. And don't take
amphetamines to the point of wondering if this was the fatal dose that will cause your demise. God bless.