It's doesn't get more fun with higher dosages. You're just going to end up more on edge. Modafinil works by blocking the neurotransmitter that promotes sleepiness. Most stimulants work by causing your brain to dump tons of the neurotransmitters that promote alertfulness. Different mechanisms.
Thanks, I didn't realize that.
Higher doses do further reduce the need for sleep, however. And while they don't put me on edge, they do increase the risk of saying and doing risky things. But maybe that's because I'm bipolar.
Don't try this at home without a blood pressure monitor.