Four drops is alot of fluid. You could maybe get 250mcg on a large tab size.
But why go through the hassle. Liquid administration is more accurate.
Actually now that i think of it thats a pretty good idea for my purposes. I keep a little bag of etizolam powder in my wallet for emergency purposes (because ive been horribly addicted to benzos I don't take benzos anymore unless i really need to turn down the volume on things). But its a pain to eyeball a dose of a substance thats active in the microgram range when you're on the go. I usually scrape up what might be 1-3mg depending on the situation. I rarely get too low of a dose and sometimes wind up with 7-8mg, which has a nasty rebound for me, takes me back to that place.
I should make some 1mg tabs to keep in there (1mg-2mg is all i need, even for that time recently when i realized i partially detached my right tricep after bench pressing and was looking for an escape button from that realization). The rebound from 1-2mg isnt too bad, rebound from 8mg of etizolam is actually pretty nasty.
I'd probably use high proof ethanol myself. What you likely (inevitably) have is a propylene glycol solution which should work but they'd be kind of greasy, not good for a wallet