Wow you poor thing!
LOL!!!! A wife and 2 teenage daughters?
I was prescribed PreMens also when I complained of PMS mood swings, I couldn't find anything about it on the internet (Google failed me) except that "Agnus Castus" apparently is also used for bi-polar disorder in a different dosage.
I was told to take it every day for 3 months, not only when I was symptomatic.
I'd say it works pretty well, I'd forgotten all about it since coming back from the US (I only just dug it out of my carry-on now) and this cycle was the first in a while that I started being all wicked again (so about 2 months off after being on for 2 months solid).
Poor hubby... maybe I should go back to taking it, the last couple weeks have been a bit torturous.
Learn to love your PMS girls. Embrace it. Save up any issues you may have with anyone over the course of the cycle and then really let loose when the hormones kick in. It's very empowering!
In PMS veritas!