Naxitamab-gqgk injection may cause serious or life-threatening reactions. A doctor or nurse will watch you or your child closely while receiving the infusion and for at least 2 hours afterwards to provide treatment in case of a serious reaction to the medication. You may be given other medications before and during naxitamab-gqgk to prevent or manage infusion reactions. Tell your doctor immediately if you experience any of the following symptoms during your infusion or after your infusion: hives; rash; itching; reddening of the skin; fever; chills; wheezing or difficulty breathing or swallowing; swelling of the face, throat, tongue, or lips; dizziness, lightheadedness, or fainting; or a fast heartbeat.

Naxitamab-gqgk injection can cause damage to nerves that may result in pain or other symptoms. You or your child may receive pain medication before, during, and after the naxitamab-gqgk infusion. Tell your doctor or other health care provider(s) immediately if you or your child experience any of the following symptoms during and after the infusion: severe or worsening pain, particularly in the stomach, back, chest, muscles or joints; numbness, tingling, burning, or weakness in the feet or hands; difficulty urinating or emptying your bladder; headache; blurred vision, vision changes, larger pupil size, difficulty focusing, or sensitivity to light; confusion or decreased alertness; difficulty speaking; or seizures.

Your doctor or pharmacist will give you the manufacturer’s patient information sheet (Medication Guide) when you begin treatment with naxitamab-gqgk and each time you refill your prescription. Read the information carefully and ask your doctor or pharmacist if you have any questions. You can also visit the Food and Drug Administration (FDA) website (http://www.fda.gov/Drugs/DrugSafety/ucm085729.htm) or the manufacturer’s website to obtain the Medication Guide.

Talk to your doctor about the risk(s) of receiving naxitamab-gqgk.