Gazyva 1000mg injection contains the active substance Obinutuzumab. It is an antineoplastic drug that belongs to the class of medications called Anti-CD20 monoclonal antibodies. It is used in combination with other anticancer medicines to treat chronic lymphocytic leukaemia (CLL) and non-Hodgkin's lymphoma (NHL)  in adults. It works by killing and stopping cancer cells from growing. Do not take this Gazyva 1000mg injection if you are allergic to obinutuzumab or any other ingredients of this medicine. Inform your physician if you have an active infection, or suffered from any infections, weak immune system, have or had heart problems, brain disorders, eye disorders, breathing problems, and liver diseases. Report to your physician if you face any symptoms of sudden difficulty in breathing, dizziness, diarrhoea, cough, skin rash, chest pain, or fever after the administration of the injection. Inform your physician if you face any symptoms of memory loss, trouble speaking, difficulty walking, or problems with your eyesight during the treatment with Gazyva 1000mg injection because these may indicate rare and life-threatening side effects. This medicine is not recommended for children and young people under 18 years of age. Use an effective method of contraception while being treated with this injection.   Avoid pregnancy and breastfeeding during the treatment.