Before you begin using a medication, be sure to inform your doctor of any medical conditions or allergies you may have, any medications you are taking, whether you are pregnant or breast-feeding, and any other significant facts about your health. These factors may affect how you should use this medication.
Anemia: Daratumumab may cause low levels of red blood cells. If you experience symptoms of reduced red blood cell count (anemia) such as shortness of breath, feeling unusually tired, or pale skin, contact your doctor as soon as possible. Your doctor will order routine blood tests to make sure potential problems are caught early.
Bleeding: Daratumumab may cause a reduced number of platelets in the blood, which can make it difficult to stop cuts from bleeding. If you notice any signs of bleeding, such as frequent nosebleeds, unexplained bruising, or black and tarry stools, notify your doctor as soon as possible. Your doctor will order routine blood tests to make sure potential problems are caught early.
Infection: As well as killing cancer cells, daratumumab can reduce the number of cells that fight infection in the body (white blood cells). If possible, avoid contact with people with contagious infections. Tell your doctor immediately if you notice signs of an infection, such as fever or chills, severe diarrhea, shortness of breath, prolonged dizziness, headache, stiff neck, weight loss, or listlessness. Your doctor will do blood tests regularly to monitor the number of specific types of blood cells in your blood.
Infusion reactions: This medication can cause a hypersensitivity or infusion reaction. Your doctor will prescribe a corticosteroid, an antihistamine, and a fever-reducing medication to help reduce the risk of this type of reaction. People who have breathing problems such as asthma or chronic obstructive pulmonary disease (COPD) may require inhalers if breathing problems develop after the infusion. Infusion reactions generally appear during the infusion of the medication and may include flushing, chest pain, shortness of breath, and a dramatic drop in blood pressure. In rare instances, these reactions can cause death, so it is important to let your nurse or doctor know immediately if you notice any unusual reactions.
Pregnancy: This medication should not be used during pregnancy unless the benefits outweigh the risks. If you become pregnant while taking this medication, contact your doctor immediately. Women who may become pregnant who are taking daratumumab should use an effective method of birth control such as condoms during treatment and for 3 months after the last dose of this medication.
Breast-feeding: It is not known if daratumumab passes into breast milk. If you are a breast-feeding mother and are taking this medication, it may affect your baby. Talk to your doctor about whether you should continue breast-feeding.
Children: The safety and effectiveness of using this medication have not been established for children.