Cyclophosphamide is a powerful medicine used to treat severe eye conditions like sight-threatening uveitis, necrotising scleritis, and certain types of vasculitis, by suppressing the immune system.
| Drug class | Alkylating Agent |
|---|---|
| Type | Single |
| Forms | Tablet / IV |
| Common strength | 50 mg tab / IV pulse |
| Common Indian brands | Endoxan, Cytoxan |
| Prescription status | Prescription (hospital use) |
What Cyclophosphamide is used for
Cyclophosphamide is a very strong medicine prescribed by eye specialists at Pristine Eye Hospitals for severe and serious eye conditions. It is used when other treatments might not be enough or when the condition is threatening your eyesight. Specifically, it helps manage:
- Severe Sight-Threatening Uveitis: Uveitis is inflammation inside the eye. When it’s severe and could cause permanent vision loss, cyclophosphamide can be used to control the inflammation and protect your sight.
- Necrotising Scleritis: This is a very serious and painful inflammation of the white part of your eye (sclera) that can lead to tissue damage and vision loss. Cyclophosphamide helps to stop this destructive inflammation.
- GPA/Vasculitis: Granulomatosis with Polyangiitis (GPA) and other forms of vasculitis are conditions where the body’s immune system attacks blood vessels. When these conditions affect the eyes, cyclophosphamide is used to reduce the inflammation and prevent damage.
Because of its strength, cyclophosphamide is only used for very specific and serious situations under the careful guidance of a specialist doctor.
How it works
Cyclophosphamide is an ‘immunomodulator,’ specifically an ‘alkylating agent.’ In simpler terms, it is a powerful medicine that works by suppressing your body’s immune system. Our immune system normally protects us from infections, but in conditions like severe uveitis, scleritis, or vasculitis, the immune system mistakenly attacks healthy parts of the eye or blood vessels, causing inflammation and damage.
Cyclophosphamide reduces this overactive immune response, stopping the immune system from attacking your own body. By doing so, it helps to control the inflammation, prevent further damage to your eyes, and protect your vision. Because it is so powerful, it is used only when absolutely necessary and under strict medical supervision.
How it’s used
Cyclophosphamide is a powerful medicine that is always administered under the direct supervision of specialist doctors in a hospital or clinic setting. It is never for self-use at home.
It can be given in two main ways:
- Oral Tablets: You might be prescribed cyclophosphamide as a 50 mg tablet to be taken daily by mouth. Your doctor will give you precise instructions on how and when to take these tablets. It is crucial to follow these instructions exactly.
- Intravenous (IV) Pulses: In some cases, cyclophosphamide is given directly into your vein as an ‘IV pulse.’ This means you will receive the medicine through a drip over a period of time, usually in a hospital. These IV pulses are given at specific intervals determined by your doctor.
Regardless of the form, your doctor will determine the correct dose and schedule based on your specific condition, your body’s response, and careful monitoring. It is very important to attend all your scheduled appointments for administration and monitoring.
Always follow your ophthalmologist’s exact instructions.
Brands available in India
- Endoxan
- Cytoxan
Brand availability and pricing vary; confirm with your pharmacist.
Please note
Powerful medicine that suppresses the immune system. Screening for tuberculosis and hepatitis is usually required before starting, and it raises the risk of infection. Used only under specialist supervision with regular monitoring. This is given only by specialists in a hospital or clinic setting and is never for self-use.
Precautions & side effects
Cyclophosphamide is a powerful medicine and requires very careful monitoring and attention to precautions. Your doctor at Pristine Eye Hospitals will discuss all these points with you in detail before starting treatment.
- Close Monitoring is Essential: Because cyclophosphamide suppresses the immune system, it requires close monitoring of your blood counts to ensure your body is responding safely. Regular blood tests will be scheduled.
- Bladder Monitoring: This medicine can sometimes affect the bladder, so your doctor will also monitor your bladder health closely. It is important to report any changes in urination or discomfort immediately.
- Fertility Effects: Cyclophosphamide can affect fertility in both men and women. If you are planning to have children in the future, it is very important to discuss this with your doctor before starting treatment. They can provide advice and discuss options.
- Suppressed Immune System and Infection Risk: This medicine works by suppressing your immune system. While this is necessary to treat your eye condition, it also means your body’s ability to fight off infections is reduced. You will have a higher risk of getting infections.
- Screening for Tuberculosis and Hepatitis: Before starting cyclophosphamide, your doctor will usually conduct screening tests for tuberculosis (TB) and hepatitis. This is to ensure that these conditions are not present or are managed appropriately, as cyclophosphamide could worsen them.
- Specialist Supervision: Cyclophosphamide is a high-warning level medicine and is only used under the strict supervision of specialist doctors in a hospital or clinic setting. It is never for self-use.
- Report Any Unusual Symptoms: It is crucial to report any new or unusual symptoms to your doctor immediately, especially signs of infection like fever, chills, sore throat, or any unexplained bruising or bleeding.
Understanding Your Eye Condition and Treatment
At Pristine Eye Hospitals, we understand that being diagnosed with a severe eye condition can be concerning. Conditions like severe uveitis, necrotising scleritis, and vasculitis affecting the eyes are serious and require careful management to protect your vision. Uveitis is an inflammation of the uvea, the middle layer of your eye, which can lead to pain, redness, light sensitivity, and blurred vision. If left untreated or if it’s very severe, it can cause permanent damage and vision loss. Necrotising scleritis is a painful and destructive inflammation of the sclera, the white outer layer of your eye. Vasculitis, when it affects the eyes, involves inflammation of blood vessels that can impair blood flow and damage eye tissues. These conditions are often caused by an overactive immune system that mistakenly attacks healthy eye tissues.
Cyclophosphamide is a powerful medicine chosen for these severe conditions because it effectively calms down this overactive immune system. It’s a critical tool in preventing further damage and preserving your eyesight when other treatments might not be sufficient. Your specialist doctor at Pristine Eye Hospitals has carefully considered your condition and determined that cyclophosphamide is the most appropriate treatment to achieve the best possible outcome for your vision. We are here to support you through every step of this treatment journey, ensuring you receive the best care and monitoring.
General Advice for Patients on Immunosuppressants
Since cyclophosphamide suppresses your immune system, it’s very important to take extra precautions to stay healthy and prevent infections. Here are some general tips:
- Practice Good Hygiene: Wash your hands frequently and thoroughly with soap and water, especially before eating and after using the restroom. Use an alcohol-based hand sanitiser if soap and water are not available.
- Avoid Crowds and Sick People: Try to avoid large gatherings and close contact with anyone who is sick, especially with colds, flu, or other infections.
- Maintain a Healthy Lifestyle: Eat a balanced diet, get enough rest, and engage in light exercise if your doctor approves. These habits can help support your overall health.
- Be Aware of Infection Signs: Pay close attention to your body and report any signs of infection to your doctor immediately. These can include fever, chills, sore throat, persistent cough, unusual aches, or any new skin rashes or sores. Early detection and treatment of infections are crucial.
- Inform Other Doctors: Always inform any other doctors or dentists you see that you are taking cyclophosphamide, as this can affect their treatment decisions, especially regarding vaccinations or procedures.
- Travel Precautions: If you plan to travel, especially internationally, discuss this with your doctor beforehand. They can advise you on any specific precautions or vaccinations you might need.
Remember, your healthcare team at Pristine Eye Hospitals is always available to answer your questions and address any concerns you may have. Do not hesitate to reach out to us.
When to Seek Medical Help
While you are on cyclophosphamide, it is very important to be vigilant and know when to contact your doctor or seek emergency medical help. This medicine requires close monitoring, and prompt action can prevent complications.
- Immediate Medical Attention (Call Emergency Services or Go to the Nearest Hospital):
- If you develop a high fever (usually above 100.4°F or 38°C) or chills.
- If you experience severe pain in your lower abdomen or difficulty urinating.
- If you have any signs of a severe allergic reaction, such as difficulty breathing, swelling of your face or throat, or a widespread rash.
- If you notice any unusual bleeding or bruising, such as blood in your urine, black or tarry stools, or nosebleeds that won’t stop.
- Contact Your Doctor at Pristine Eye Hospitals Immediately If You Experience:
- Any new or worsening eye pain, redness, or vision changes.
- Persistent nausea, vomiting, or severe diarrhoea.
- Unusual fatigue or weakness.
- Any new or persistent sore throat, cough, or other signs of infection.
- Any changes in your urination habits or discomfort when urinating.
- Any skin rash or changes.
- If you miss a dose of your oral medication or have concerns about your IV appointment.
Always keep the contact number for Pristine Eye Hospitals handy. Your health and safety are our top priority, and we are here to provide you with the best possible care.
Frequently asked questions
What is Cyclophosphamide used for?
Cyclophosphamide is a powerful medicine used to treat severe eye conditions like sight-threatening uveitis, necrotising scleritis, and certain types of vasculitis that affect the eyes. It is prescribed when these conditions are very serious and could lead to vision loss.
How does Cyclophosphamide work?
Cyclophosphamide works by suppressing your body's immune system. In conditions like severe uveitis or scleritis, the immune system mistakenly attacks healthy eye tissues. By reducing this overactive immune response, cyclophosphamide helps to control inflammation and prevent further damage to your eyes.
What are the common Indian brands of Cyclophosphamide?
In India, Cyclophosphamide is commonly available under brand names such as Endoxan and Cytoxan.
How is Cyclophosphamide administered?
Cyclophosphamide can be given in two ways: as a 50 mg tablet taken daily by mouth, or as intravenous (IV) pulses, where the medicine is given directly into your vein through a drip in a hospital setting. The method and dose will be decided by your specialist doctor.
Do I need a prescription for Cyclophosphamide?
Yes, Cyclophosphamide is a prescription-only medicine and is considered a high-warning level drug. It is always administered and monitored by specialists in a hospital or clinic setting and is never for self-use.
What are the key precautions I should be aware of when taking Cyclophosphamide?
Key precautions include the need for close monitoring of your blood counts and bladder health, potential effects on fertility (which should be discussed with your doctor), and an increased risk of infection due to immune system suppression. Screening for tuberculosis and hepatitis is usually required before starting treatment, and it is only used under specialist supervision with regular monitoring.
References
- Cyclophosphamide for ocular inflammatory diseases – PMC – NIH
- Cyclophosphamide: MedlinePlus Drug Information
- Cyclophosphamide – StatPearls – NCBI Bookshelf – NIH
- Eye health information – American Academy of Ophthalmology
- Learn about eye health – National Eye Institute (NIH)
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.