Before you start taking Verzenio, tell your doctor about:, All the medications you take, including prescription and over-the-counter medications, herbals, and supplements, Your allergies, Your past medical history and current health problems, Your pregnancy or breastfeeding status, Severe diarrhea can occur with Verzenio treatment. Contact your healthcare provider right away if you develop diarrhea., Low white blood cell counts can occur with Verzenio treatment., Interstitial lung disease and pneumonitis can occur with Verzenio treatment and may be severe or lead to death., Liver problems can occur with Verzenio treatment., Blood clots can occur with Verzenio treatment., Verzenio can cause harm to an unborn baby. Effective methods of birth control should be used. All the medications you take, including prescription and over-the-counter medications, herbals, and supplements, Your allergies, Your past medical history and current health problems, Your pregnancy or breastfeeding status