Natalizumab is a medicine used to treat relapsing multiple sclerosis, administered as an intravenous infusion.
| Drug class | Monoclonal Antibody |
|---|---|
| Type | Single |
| Forms | IV Infusion |
| Common strength | 300 mg |
| Common Indian brands | Tysabri |
| Prescription status | Prescription (hospital use) |
What Natalizumab is used for
Natalizumab is a specialized medicine primarily used in the field of Neuro-Ophthalmology. It is prescribed for specific conditions that affect both the nervous system and, indirectly, vision. At Pristine Eye Hospitals, our specialists may recommend Natalizumab for patients diagnosed with:
- Relapsing multiple sclerosis
Multiple sclerosis (MS) is a chronic disease that affects the brain, spinal cord, and optic nerves. In its relapsing form, patients experience periods of new or worsening symptoms (relapses) followed by periods of recovery. Natalizumab helps manage this condition by targeting the underlying immune processes.
How it works
Natalizumab belongs to a category of medicines known as Monoclonal Antibodies. These are specially designed proteins that can target specific substances in the body. In the case of Natalizumab, its mechanism of action is focused on the immune system.
Specifically, Natalizumab works by blocking certain immune cells from entering the brain and spinal cord. In conditions like multiple sclerosis, the immune system mistakenly attacks the protective covering of nerve fibers, leading to damage. By preventing these immune cells from crossing into the central nervous system, Natalizumab helps to reduce the inflammation and damage that contribute to the symptoms of relapsing multiple sclerosis. This targeted action helps to slow down the progression of the disease and reduce the frequency and severity of relapses.
How it’s used
Natalizumab is administered as an intravenous (IV) infusion. This means the medicine is given directly into your vein, usually in your arm, over a period of time. It is not a medicine you can take at home yourself.
The typical dosing schedule for Natalizumab is once every four weeks. Your ophthalmologist or neurologist at Pristine Eye Hospitals will determine the exact schedule and duration of your treatment based on your specific condition and response to the medicine. Each infusion will be given in a hospital or clinic setting under the supervision of trained medical professionals.
It is crucial to attend all your scheduled appointments for the infusion to ensure the medicine works effectively and to monitor your progress. If you miss an appointment or have any concerns about your treatment schedule, please contact your healthcare team at Pristine Eye Hospitals immediately.
Always follow your ophthalmologist’s exact instructions.
Brands available in India
- Tysabri
Brand availability and pricing vary; confirm with your pharmacist.
Good to know
Prescription eye medicine — use only as directed by a qualified ophthalmologist. This page is for general education and is not a substitute for professional medical advice, diagnosis or a prescription. Do not self-medicate or reuse an old prescription. This is given only by specialists in a hospital or clinic setting and is never for self-use.
Precautions & side effects
While Natalizumab is an effective treatment for relapsing multiple sclerosis, it is important to be aware of certain precautions and potential risks. Your doctor at Pristine Eye Hospitals will discuss these with you in detail before starting treatment.
- PML Risk: One of the most significant precautions with Natalizumab is the risk of a rare but serious brain infection called Progressive Multifocal Leukoencephalopathy (PML). PML is caused by the John Cunningham (JC) virus.
- JC Virus Monitoring: Because of the PML risk, regular monitoring for the JC virus is required before and during your treatment with Natalizumab. Your doctor will conduct specific tests to assess your risk and monitor for any signs or symptoms of PML.
- Hospital Use Only: Natalizumab is a prescription medicine for hospital use only. It is administered by specialists in a hospital or clinic setting and is never for self-use.
- Prescription Required: This medicine requires a valid prescription from a qualified ophthalmologist or neurologist. Do not attempt to self-medicate or use an old prescription.
It is vital to report any new or worsening symptoms, especially those affecting your brain function, vision, speech, or movement, to your doctor immediately. Early detection and management of any potential complications are crucial.
Understanding Relapsing Multiple Sclerosis
Relapsing multiple sclerosis (RMS) is a chronic condition that affects the central nervous system, which includes your brain, spinal cord, and optic nerves. In RMS, the immune system, which normally protects your body from infections, mistakenly attacks the myelin sheath – the protective covering around nerve fibers. This damage disrupts the communication between your brain and the rest of your body, leading to a variety of symptoms.
Symptoms of RMS can vary widely from person to person and may include fatigue, numbness or tingling, muscle weakness, problems with balance and coordination, vision problems (like blurred vision or double vision), pain, and issues with memory or concentration. These symptoms typically appear during ‘relapses’ or ‘flares,’ which are periods of new or worsening symptoms. These relapses are often followed by ‘remissions,’ where symptoms improve or disappear. Over time, repeated relapses can lead to accumulated disability.
At Pristine Eye Hospitals, our specialists work closely with neurologists to diagnose and manage RMS. While there is currently no cure for MS, treatments like Natalizumab aim to reduce the frequency and severity of relapses, slow down disease progression, and help manage symptoms, thereby improving your quality of life. Regular follow-ups and adherence to your treatment plan are essential for managing this condition effectively.
General Advice for Patients Receiving IV Infusions
Receiving an intravenous (IV) infusion like Natalizumab requires specific care and attention. Here are some general guidelines to help you prepare and manage your treatment:
- Preparation: Before each infusion, your healthcare team will provide specific instructions. This might include advice on eating and drinking, and any medications you should or shouldn’t take on the day of your infusion. Always follow these instructions carefully.
- During the Infusion: The infusion will be administered by a trained nurse or doctor. You will be seated comfortably, and a small needle will be inserted into a vein, usually in your arm. The medicine will then slowly drip into your bloodstream. The duration of the infusion will be specified by your doctor. During this time, you can usually read, listen to music, or simply relax.
- After the Infusion: Once the infusion is complete, the needle will be removed, and a dressing will be applied to the site. You may be monitored for a short period to ensure there are no immediate reactions. You can usually resume most of your normal activities afterward, but it’s always best to follow any specific advice given by your healthcare team.
- Reporting Concerns: It is crucial to report any unusual symptoms or discomfort during or after the infusion to your doctor or nurse immediately. This includes any signs of an allergic reaction such as rash, itching, swelling, dizziness, or difficulty breathing.
When to Seek Medical Help
While Natalizumab is generally well-tolerated, it is important to be vigilant about your health and know when to contact your healthcare provider. Always remember that your medical team at Pristine Eye Hospitals is here to support you.
You should contact your doctor immediately if you experience any new or worsening symptoms, especially those that could indicate a serious side effect. This includes:
- Any changes in your vision, such as blurred vision, double vision, or loss of vision.
- New or worsening weakness on one side of your body, or difficulty with walking or coordination.
- Changes in your thinking, memory, or personality.
- Difficulty speaking or understanding speech.
- Persistent headaches, seizures, or confusion.
- Any signs of infection, such as fever, chills, or unusual fatigue.
- Severe allergic reactions like rash, itching, swelling of the face/throat, severe dizziness, or trouble breathing.
Do not wait for your next scheduled appointment if you have urgent concerns. Always keep the contact information for Pristine Eye Hospitals readily available. Regular communication with your healthcare team is key to safe and effective treatment with Natalizumab.
Frequently asked questions
What is Natalizumab used for?
Natalizumab is a medicine primarily used to treat relapsing multiple sclerosis, a condition affecting the brain, spinal cord, and optic nerves.
How does Natalizumab work?
Natalizumab works by blocking certain immune cells from entering the brain and spinal cord, which helps reduce the inflammation and damage associated with relapsing multiple sclerosis.
What are the common Indian brands for Natalizumab?
The common brand name for Natalizumab available in India is Tysabri.
How is Natalizumab administered?
Natalizumab is administered as an intravenous (IV) infusion, meaning it is given directly into a vein, typically every four weeks, in a hospital or clinic setting.
Do I need a prescription for Natalizumab?
Yes, Natalizumab is a prescription-only medicine and is for hospital use only. It must be prescribed and administered by a qualified ophthalmologist or neurologist in a hospital or clinic setting.
What are the key precautions to be aware of with Natalizumab?
A key precaution with Natalizumab is the risk of a rare but serious brain infection called PML (Progressive Multifocal Leukoencephalopathy). Regular monitoring for the JC virus, which causes PML, is required before and during treatment. It is crucial to report any new or worsening symptoms to your doctor immediately.
References
- Natalizumab (Tysabri, Tyruko): Uses, Side Effects, Interactions, Pictures, Warnings & Dosing
- An experimental study to evaluate safety/toxicity of intravitreal natalizumab – PMC
- Eye health information – American Academy of Ophthalmology
- Learn about eye health – National Eye Institute (NIH)
- Blindness and vision impairment – World Health Organization
Medically reviewed by Dr. C Jagadesh Reddy, Chief Surgeon: Cornea, Cataract and Refractive Surgery — last reviewed 2026-07-28.
This page is for general education only and is not a substitute for professional medical advice, diagnosis or treatment. Never self-medicate or reuse an old prescription. Always consult a qualified ophthalmologist before starting, changing or stopping any eye medicine.