a lot of the liquid stuff has flakes, so just shaking should be enough to make sure you get the dose you want. heat will sometimes help if it needs to dissolve, but this sounds like it's going to have flakes since it comes with a dropper.
(I've just used the pill combo's of those BTW, but have used liquid Arimidex a long time ago, and some liquid Winstrol (winny). I think the Arimidex mostly disolved, but the Winstrol (winny) keeps the little flakes)