There are worms in my brain. I don't know when exactly they got in there, but they've been there for quite some time now. My thoughts flow through the tunnels the worms have burrowed through my gray matter, and they themselves sometimes carry my thoughts around. But these worms are not very efficient for my purposes, partly because they squirm around randomly and partly because they have no goal in mind towards which to work efficiently.
Of course they have nothing in mind, they're worms, damn it! They are what's in my mind; pay attention to the metaphor!
Anyway, the workings of the worms are not conducive to getting things done. Trying to direct them so that my thoughts flow smoothly and directly towards a certain goal is like, well, it's like trying to herd a bunch of damn worms. They don't pay attention to anything but wriggling and burrowing. But that's what the pills are for, these little blue pills.
The pills do something I've never been able to do: they force the worms to line up in neat little rows and march in time to the tune of whatever goals I set. How worms can be made to march without feet I don't know, but they're marching all right. In spit-shined jackboots, no less. With the pills controlling the worms, I become a machine. A powerful, efficient machine that runs smoothly as a dream on lubricated bearings. The pounding march of the worms makes sure the trains of my thought all run on time, and the jackboots stamp out errant or unwanted thoughts with hardly a sound. For a few hours, everything runs better than ever before, better than it should. For a few hours, I am effective. Then the pills wear off.
When the pills start to wear off, I can't keep the worms in line anymore. But the damning thing is that they keep on marching around in jackboots. With no more rhyme or reason guiding them they stomp all around my brain, trampling everything and my trains of thought go flying off the tracks. I become the machine with half of its bearings taken out, rattling and screeching, performing its tasks with grinding, noisy hesitancy. Everything inside and outside my head becomes a disordered mess and I know that at any moment I might truly begin to laugh and laugh and laugh until I realize I'm screaming.
Finally, the jackbooted feet the worms never had in the first place wear off and they go back to wriggling and burrowing. I am no longer the machine, and I can rest until I need to be effective again.