NIVESTYM may cause side effects, including:
Spleen rupture
Your spleen may become enlarged and can rupture while taking NIVESTYM. A ruptured spleen can cause death. The spleen is located in the upper left section of the belly or stomach area. Call your doctor right away if you have pain in the left upper stomach area or left shoulder tip area. This pain could mean your spleen is enlarged or ruptured.
Serious allergic reactions
NIVESTYM can cause serious allergic reactions. These reactions can cause a rash over your whole body, shortness of breath, wheezing, dizziness, swelling around your mouth or eyes, fast heart rate, and sweating. If you have any of these symptoms, stop using NIVESTYM and call your doctor or seek emergency care right away. If you or your child has an allergic reaction during the injection of NIVESTYM, stop the injection right away.
A serious lung problem called acute respiratory distress syndrome (ARDS)
Call your healthcare provider or get emergency medical help right away if you have shortness of breath, trouble breathing, or a fast rate of breathing.
Sickle cell crisis
Call your doctor or seek emergency care right away if you experience severe pain in bones, chest, gut, or joints.
Kidney injury (glomerulonephritis)
Call your healthcare provider right away if you experience puffiness of the face or ankles, blood in the urine or brown-colored urine, or if you notice that you urinate less often than usual.
The most common side effect you may experience is bone, joint, and/or muscle pain. This pain can usually be relieved by taking a non-acetylsalicylic acid (non-aspirin) pain reliever such as acetaminophen.
Other common side effects can be fatigue, headache, loss of appetite, diarrhea, cough, sore throat, elevation in liver enzymes, and reduction in platelets (cells involved in clotting), which increases the risk of bleeding or bruising.
Some people experience a lump, redness, swelling, bruising, or itching at the site of injection. This may be an allergy to the ingredients in NIVESTYM or it may be a local reaction. If you notice any signs of a local reaction, call your doctor. If at any time a serious allergic reaction occurs, immediately call a healthcare provider or emergency services (for example, call 911).
Talk to your doctor if you experience unusual bleeding or bruising while taking NIVESTYM following chemotherapy as this could mean a decrease of platelets, which reduces the ability of blood to clot.
These are not all the possible side effects of NIVESTYM. Call your healthcare provider for medical advice about side effects.