It is very difficult to know exactly what good should come out of a particular situation. To attempt to manipulate circumstances so your idea of good can come about, is to let the ego play God-and that, as you know, can and does backfire.
It should not be taken in a hot climate. If you are in a place that is cool and peaceful, and you are alone and your mind is turned toward God, then you may take the yogi medicine.
Even if a person hurts you, give him love. The worst punishment is to throw someone out of your heart. You should love everyone as God, and love each other. If you cannot love each other, you cannot achieve your goal.
