I should be safe for the next few lifetimes.
That's hard to say -- different coffee beans, different coffee roasts, different methods of preparing the coffee can result in significantly different amounts of caffeine.
I was absolutely shocked, as a life long coffee drinker, to stay WIDE awake ALL NIGHT hyper-ALERT and unable to sleep the first day that I took one little No-Doz tablet, which simply contains 200 mg. caffeine... supposedly the amount in 1 or 2 cups of coffee, depending upon the brew.
lol, me too. I don’t take NO DOZ, I do want to sleep a little bit.