you just have to try it and see for yourself I guess. I was worried about not taking dry Vit D in the beginning because I heard we can't absorb it well, but I absorbed it very well and my level was getting too high.
It depends on the medicine and also how far you are out. I take a med in capsule form but I take more of the medicine than most people take. Fortunately they can check blood levels and see how well I absorb it.