Maball 500 (Rituximab) 500 mg/50 mL
Maball 500 (Rituximab 500 mg/50 ml) is a chimeric monoclonal antibody targeting CD20 antigen.
Manufacturer: Hetero Healthcare (India). It is a biosimilar to MabThera/Rituxan. The 500 mg vial serves as a convenient high-dose option for oncology protocols.
Mechanism of Action ("Search and Destroy"):
Rituximab specifically binds to the CD20 transmembrane antigen found on pre-B and mature B lymphocytes. Once bound, it triggers the body's immune defenses (CDC and ADCC mechanisms) to attack and lyse (break down) these cells. By depleting B-cells, it treats both B-cell malignancies and autoimmune disorders driven by B-cell activity.
✅ Key Benefit: Standard-of-care efficacy in treating CD20-positive lymphomas and leukemias.
Indicated for CD20-positive conditions:
- 🩸 Non-Hodgkin’s Lymphoma (NHL): Follicular lymphoma and Diffuse Large B-Cell Lymphoma (DLBCL).
- 🩸 Chronic Lymphocytic Leukemia (CLL): First-line and relapsed/refractory treatment.
- 🦴 Rheumatoid Arthritis (RA): Moderate to severe active RA in patients with inadequate response to TNF inhibitors.
- Granulomatosis with Polyangiitis (GPA).
Packaging: 50 ml Vial (Concentration 10 mg/ml = Total 500 mg).
⚠️ ADMINISTRATION & SAFETY:
- 💉 IV Infusion Only: Must be administered via a dedicated line. NEVER administer as an IV push or bolus.
- 💊 Premedication: Antipyretics (e.g., paracetamol) and antihistamines (e.g., diphenhydramine) must be given before each infusion to reduce reactions.
- ⏱ Rate: Infusion starts slowly and rate is increased gradually if well-tolerated.
- Active, severe infections (e.g., tuberculosis, sepsis).
- Severe heart failure (NYHA Class IV).
- Known hypersensitivity to murine proteins.
- Pregnancy and breastfeeding (unless benefit outweighs risk).
Critical monitoring required for:
- 🚨 Infusion-Related Reactions (IRRs): Fever, chills, rigor, hypotension (very common during the first dose).
- 🦠 Infections: Reactivation of Hepatitis B virus (screening is mandatory before starting therapy).
- 📉 Hematologic: Neutropenia, leukopenia.
- PML (Progressive Multifocal Leukoencephalopathy) - rare but serious.
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