Ocrelizumab (ocrelizumab) — Uses, Dosage, Side Effects & Safety

Drug class: Monoclonal antibody; Disease-modifying therapy (DMT) for multiple sclerosis

Overview

Ocrelizumab is a prescription medicine used to treat adults with certain types of multiple sclerosis (MS), including relapsing forms and primary progressive MS. It works by targeting and reducing specific immune cells (B cells) that are believed to play a key role in the abnormal immune response seen in MS. By lowering the number of these B cells, ocrelizumab helps decrease inflammation and nerve damage in the brain and spinal cord. This can reduce the frequency of MS relapses, slow the progression of disability, and help maintain daily functioning. Key points for patients: Ocrelizumab is given as an intravenous infusion in a healthcare setting, usually every 6 months. It is important to attend all scheduled infusions and follow your healthcare provider's instructions. Ocrelizumab can affect your immune system, so regular monitoring and infection precautions are necessary.

Therapeutic uses

  • Relapsing-remitting multiple sclerosis (RRMS)
  • Primary progressive multiple sclerosis (PPMS)
  • Active secondary progressive multiple sclerosis (SPMS)

Common side effects

  • Infusion reactions
  • Upper respiratory tract infections
  • Skin infections
  • Herpes infections
  • Progressive multifocal leukoencephalopathy (PML)
  • Hepatitis B reactivation
  • Increased risk of malignancy

Frequently Asked Questions about Ocrelizumab

How does ocrelizumab work in multiple sclerosis?

Ocrelizumab targets and depletes CD20-positive B cells, which are believed to contribute to the abnormal immune response in MS. By reducing these cells, it helps decrease inflammation and nerve damage.

How often do I need to get ocrelizumab infusions?

After the initial two infusions two weeks apart, ocrelizumab is typically given once every 6 months.

What should I do if I develop a fever or signs of infection while on ocrelizumab?

Contact your healthcare provider immediately, as ocrelizumab can increase your risk of infections. Prompt evaluation and treatment are important.

Can I receive vaccines while on ocrelizumab?

You should not receive live or live-attenuated vaccines during treatment. Inactivated vaccines may be less effective. Discuss your vaccination schedule with your doctor before starting therapy.

Is ocrelizumab safe during pregnancy or breastfeeding?

The safety of ocrelizumab in pregnancy and breastfeeding is not established. Discuss potential risks and benefits with your healthcare provider if you are pregnant, planning to become pregnant, or breastfeeding.

What are the most serious risks with ocrelizumab?

Serious risks include severe infections, hepatitis B reactivation, infusion reactions, and possibly increased risk of some cancers. Regular monitoring is required.

Can children use ocrelizumab?

Ocrelizumab is not approved for use in children or adolescents under 18 years old.

Educational information only. Always consult a qualified healthcare professional before starting, stopping, or changing any medication.