Yes, you’ll need to have regular blood tests to monitor your blood cells and your liver function while you take Ibrance.
Ibrance can cause your white blood cell count to fall, which can increase your risk of infections. Very low white blood cell counts can put you at risk of serious, potentially life-threatening infections.
Your doctor will want you to have regular blood tests to check your white blood cell counts, so any problems can be found early. If your white blood cell counts start to fall, your doctor may lower your dosage of Ibrance. They may also have you take a break from treatment until your blood cells recover.
Ibrance can also cause your red blood cell count to fall. This is called anemia. It can make you look pale and feel tired, cold, or lightheaded. Your platelet count may also fall, which can make you bruise or bleed more easily. (Platelets are blood cells that help your blood to clot.) Your blood tests will also check your red blood cell and platelet counts.
Ibrance can sometimes damage your liver, causing certain liver enzymes to be released into your blood. Your doctor will want to regularly test your blood for this. These tests are called liver function tests. If your liver function tests show damage to your liver, your doctor may lower your dose of Ibrance.
If you’re a female* who can get pregnant, your doctor will also give you a pregnancy test before starting Ibrance. You shouldn’t take Ibrance if you are pregnant or planning a pregnancy.