Licorice (but don't have it if your blood pressure is high).
OTC medicine called pamprin
painkillers such as motrin and tylenol
weeping and writing sad poetry
If you are in the UK, they have the best black licorice - the soft, stretchy kind that comes in coils. You can also get it in supplement form if you live in a city that has a health food store.
Pamprin is a sort of painkiller, I forget what's in it. The British people probably have their own good stuff for PMT if you ask at the nearest pharmacy. A lot of their OTC medicines are cheaper too.