If Prozac is a "systemic" medication, in other words it takes time to build up in your system, why would a physician perscribe it for only the week before your period to help with PMDD symptoms? Is it just a placebo effect that way? I am wondering because that is how it was perscribed to me. Take 1PO QD for the 7 days prior to menstruation.
If it needs to build up in your system, this would not provide any relief, correct?