Verzenio may cause serious side effects, including:
Diarrhea is common with Verzenio, may sometimes be severe and may cause dehydration or infection. The most common time to develop diarrhea is during the first month of Verzenio treatment. If you develop diarrhea during treatment with Verzenio, your healthcare provider may tell you to temporarily stop taking it, stop your treatment, or decrease your dose.
If you have any loose stools, start taking an antidiarrheal medicine (such as loperamide), drink more fluids, and tell your healthcare provider right away.
Low white blood cell counts (neutropenia) are common with Verzenio and may cause serious infections that can lead to death. Your healthcare provider should check your white blood cell counts before and during treatment. If you develop low white blood cell counts during treatment with Verzenio, your healthcare provider may tell you to temporarily stop taking it, decrease your dose, or wait before starting your next month of treatment. Tell your healthcare provider right away if you have signs and symptoms of low white blood cell counts or infections, such as fever and chills.
Verzenio may cause severe or life-threatening inflammation (swelling) of the lungs during treatment that can lead to death. If you develop lung problems during treatment with Verzenio, your healthcare provider may tell you to temporarily stop taking it, decrease your dose, or stop your treatment. Tell your healthcare provider right away if you have any new or worsening symptoms, including:
- Trouble breathing or shortness of breath
- Cough with or without mucus
- Chest pain
Verzenio can cause serious liver problems. Your healthcare provider should do blood tests to check your liver before and during treatment. If you develop liver problems during treatment with Verzenio, your healthcare provider may reduce your dose or stop your treatment. Tell your healthcare provider right away if you have any of the following signs or symptoms of liver problems:
-
Feeling very tired
-
Pain on the upper right side of your stomach area (abdomen)
-
Loss of appetite
-
Bleeding or bruising more easily than normal
Verzenio may cause blood clots in your veins, or in the arteries of your lungs. Verzenio may cause serious blood clots that have led to death. If you develop blood clots during treatment with Verzenio, your healthcare provider may tell you to temporarily stop taking it. Tell your healthcare provider right away if you have any of the following signs and symptoms of a blood clot:
- Pain or swelling in your arms or legs
- Shortness of breath
- Chest pain
- Fast breathing
- Fast heart rate
Verzenio can harm your unborn baby. Use effective birth control (contraception) during treatment and for 3 weeks after the last dose of Verzenio and do not breastfeed during treatment with Verzenio and for at least 3 weeks after your last dose. Verzenio may affect the ability of males to father a child.
