In my experience, if you're in a relationship all it takes is to be open with your partner about your mood and libido swings, so that he can know what is going on. That extends to all other people close to you whom you have to interact with.

Sometimes, during my PMS, terrible mood changes occur, and that can happen during couple of hours. I can go from being completely fine to absolutely irritable, or I can suddenly become extremely whiny and needy. It can be really difficult not just for me, but for my significant other, if he doesn't have a clue what is going on.

So communication is the key in overcoming these tricky situations.