Maball RA 500 Injection contains the active constituent rituximab. It is used for several different disease conditions in adults. It is used alone or with other medications to treat non-hodgkin’s lymphoma (cancer affecting white blood cells called B-lymphocytes) and chronic lymphocytic leukemia (a most common form of cancer that affects B-cells). It is also indicated to treat moderate-to-severe rheumatoid arthritis (a type of disease where the immune system attacks the body cells of its own joints)  in combination with methotrexate in adults. Other uses include granulomatosis with polyangiitis or microscopic polyangiitis (inflammation of blood vessels that mainly affects the lungs and kidneys) in adults and children 2 years of age and older. It is also used to treat moderate to severe pemphigus vulgaris (an autoimmune condition that causes painful blisters on the skin and lining of the mouth, throat, nose, and genitals. Maball RA 500 Injection belongs to the class of medications called anti-CD20 monoclonal antibodies. Do not take this injection if you are allergic to rituximab or any other ingredients of this medicine, have a weak immune system, or have any severe active infection. Inform your physician if you have heart disease, heart failure, or breathing problems before initiating the treatment. Talk with your doctor if you have ever had a hepatitis B infection because in a few cases, the infection may reactivate again and can be severe sometimes. Pregnancy and breastfeeding are not recommended when you are taking this injection. Common side effects of Maball RA 500 Injection include infection of the blood, reduced red blood cells, dizziness, swelling in the face and body, itchy skin, diarrhea, increased sweating, and  low or high blood pressure. Use effective contraceptive methods during the treatment and for 12 months after the last dose if you can get pregnant. This medicine may cause severe infusion reactions during or within 24 hours after administration. Inform your physician or healthcare professional if you face any infusion reactions such as increased blood pressure, chest pain, headache, breathing difficulties, vomiting, skin rashes, or throat swelling.