I had been taking Zepbound for about six months when it clicked. My period — the monster that turned me from a functioning person into a whimpering, tremulous piece of Jell-O carving a spot into the couch — had, somehow, lost its power. As I understood it, I had premenstrual dysphoric disorder, or PMDD. More than just “heavy PMS,” PMDD meant that the week before my period I suffered from a grab bag of severe mental and physical symptoms including a new...