@Naftali TolibasIf I am consuming caffeine like I normally do, 5 to 6 hours is all I can manage.

I have my times where I hate it but others when caffeine saves me and listening to a good audiobook helps.

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There are many great people, and great people throughout history (including many of our presidents) who are and were smokers.While I am going to be as polite as possible, I very strongly disagree with your last paragraph and will tell you there are some things you should just keep to yourself.How is a cigarette any different then the sugary caffeinated has all kinds of things in it you don't know about drinks they serve at starbucks?