pinkcat
Poor thing. No idea about the effect of "drugs" on flushing. But I heard from my herbalist that it doesn't matter what time of day you flush, the stones are going to come out.
Her recipe involves drinking the OO/lemon cocktail first thing in the morning.
Perhaps you can flush in the morning on a day you're staying home. and reserve the night for just concentrating on sleeping?
Pinkcat