There's a fairly good chance that all the ladies taking the pill will become dysfunctional lunatics, for a good duration of the time.
No... I'm not calling women weak. It's just... that damn testosterone. It's essentially the body's natural steroids, and a key component in muscle building. Men with higher than average testosterone levels are also considerably more aggressive and horny. Women makes the stuff as well, of course, but the difference between male production and female production is about 20 fold. That is, men, on average, make 20 times more testosterone then women (and women wonder why men are always horny). Trans gendered female-to-male people, take testosterone to acquire masculine traits and there are reports of increased libido, especially shortly after injections.
Now, just imagine have a switch flip inside you, that's not only gonna turn you into a male, but with a 20 fold increase in testosterone, all the time.
Likewise, with men, imagine having that production flow practically shut off.
I don't know, but for most people, I'd imagine that you'd spent most of the week being incredibly confused and hormonal.
But then again, what do I know?
Still... I'll admit it... I'd be curious enough to try the week pill. It would probably be during a time period when I can get away with it, though. Where any possible complications wouldn't get in the way of my life. So probably during a vacation from work, where no family obligations are required.