THE PILLS are so pretty, so pink and lavender. Prozac, the controversial bad-boy drug of the '90, had a makeover and a comeback. Now it has a kinder, gentler look and a new name: Serafem. In case you couldn't tell by the color scheme, Serafem is marketed just for women -- specifically, women in their late 20s and early 30s -- to combat a condition known as Premenstrual Dysphoric Disorder, or PMDD. Symptoms are said to include depression, anxiety, anger and sensitivity to rejection. PMDD is called a more severe form of the collective symptoms known as premenstrual syndrome (PMS). [continues 787 words]