Information for Healthcare Providers / Patients

Gazyva® (obinutuzumab)

Side Effect Reporting

You may report side effects to the FDA at (800) FDA-1088 or

You may also report side effects to Genentech at (888) 835-2555.

What it Treats

Gazyva® (obinutuzumab) is a prescription medicine used with the chemotherapy chlorambucil, to treat chronic lymphocytic leukemia (CLL) in adults who have not had previous CLL treatment.

Important Safety Information

What is the most important safety information I should know about GAZYVA?

Tell your doctor right away about any side effect you experience. GAZYVA can cause side effects that can become serious or life threatening, including:

  • Hepatitis B Virus (HBV): Hepatitis B can cause liver failure and death. If you have a history of hepatitis B infection, GAZYVA could cause it to return. You should not receive GAZYVA if you have active hepatitis B liver disease. Your doctor or healthcare team will need to screen you for hepatitis B before, and monitor you during and after, your treatment with GAZYVA. Sometimes this will require treatment for hepatitis B. Symptoms of hepatitis include: worsening of fatigue and yellow discoloration of skin or eyes
  • Progressive Multifocal Leukoencephalopathy (PML): PML is a rare and serious brain infection caused by a virus. PML can be fatal. Your weakened immune system could put you at risk. Your doctor will watch for symptoms. Symptoms of PML include: confusion, difficulty talking or walking, dizziness or loss of balance, and vision problems

What are the additional possible serious side effects of GAZYVA?

Tell your doctor right away about any side effect you experience. GAZYVA can cause side effects that may become severe or life threatening, including:

  • Infusion Reactions: These side effects may occur during or within 24 hours of any Gazyva infusion. Some infusion reactions can be serious, including, but not limited to, severe allergic reactions (anaphylaxis), acute life-threatening breathing problems, or other life-threatening infusion reactions. If a patient has a reaction, the infusion is either slowed or stopped until the patient’s symptoms are resolved. Most patients are able to complete infusions and receive medication again. However, if the infusion reaction is serious, the infusion of Gazyva will be permanently stopped. The patient’s healthcare team will take a few steps to help lessen any side effects the patient may have to the infusion process. The patient may be given medicines to take before each Gazyva treatment. Signs of infusion reactions may include: dizziness, nausea, chills, fever, vomiting, diarrhea, breathing problems, chest pain
  • Tumor Lysis Syndrome (TLS): TLS, including death, has been reported in patients receiving GAZYVA. GAZYVA works to break down cancer cells quickly. As cancer cells break apart, their contents are released into the blood. These contents may cause damage to organs and the heart, and may lead to kidney failure requiring the need for dialysis treatment. Your doctor may prescribe medication to help prevent TLS. Your doctor will also conduct regular blood tests to check for TLS. Symptoms of TLS may include nausea, vomiting, diarrhea, and tiredness
  • Infections: While you’re taking GAZYVA, you may develop infections. Some of these infections may be severe. Fatal infections have been reported with GAZYVA, so be sure to talk to your doctor if you think you have one. Patients with active infection should not be treated with GAZYVA. Infections may continue even after you stop taking GAZYVA. Your doctor may prescribe medications to help prevent infections. Symptoms of infection include fever and cough
  • Low White Blood Cell Count: When you have an abnormally low count of infection-fighting white blood cells, it is called neutropenia. While you are taking GAZYVA, your doctor will do blood work to check your white blood cell count. Neutropenia can develop during or after treatment with GAZYVA. It may also last for more than one month. If your white blood cell count is low, your doctor may prescribe medication to help prevent infections
  • Low Platelet Count: Platelets help stop bleeding or blood loss. GAZYVA may reduce the number of platelets you have in your blood. This may affect the clotting process. While you are taking GAZYVA, your doctor will do blood work to check your platelet count and if your count gets too low, your treatment may be slowed or reduced

The most common side effects of GAZYVA are infusion reactions, low white blood cell counts, low platelet counts, low red blood cell counts, fever, cough, nausea, and diarrhea.

What other information should I tell my doctor before receiving GAZYVA?

You should talk to your doctor about:

  • Immunizations: Before receiving GAZYVA therapy, tell your healthcare provider if you have recently received or are scheduled to receive a vaccine. People who are treated with GAZYVA should not receive live vaccines
  • Pregnancy: Tell your doctor if you are pregnant, plan to become pregnant, or are breastfeeding. GAZYVA may harm your unborn baby. Speak to your doctor about using GAZYVA while you are pregnant. Talk to your doctor or your child’s doctor about the safety and timing of live virus vaccinations to your infant. It is not known if GAZYVA may pass into your breast milk. Speak to your doctor about using GAZYVA if you are breastfeeding

Tell your doctor about any side effects.

These are not all of the possible side effects of GAZYVA. For more information, ask your doctor or pharmacist.

GAZYVA is available by prescription only.

You may report side effects to the FDA at (800) FDA-1088, or You may also report side effects to Genentech at (888) 835-2555.

Please visit for the full Prescribing Information, including Boxed WARNINGS, for additional Important Safety Information.