premenstrual dysphoric disorde
"At age forty I started screaming at my kids and  my husband  was so irritating during my cycle.  I can laughingly say I wanted to kill people because I know I wouldn't ever hurt anyone.  But man I started screaming my head off at my family.  So bad in fact that I started locking myself in my bedroom during "that time. " For days.  

My doctor prescribed Fluoxetine  10mg  1 by mouth every day for 7 days before the onset of my period. I no longer scream at my kids or feel like strangling my husband.  YAAAY. 

Been  about 6 months,  no side effects that I've noticed."