Fluorescein Sodium (intravenous) is a diagnostic dye used in a special eye test called Fundus Fluorescein Angiography (FFA) to help doctors see leaking or blocked blood vessels in your eye.
| Drug class | Diagnostic Dye |
|---|---|
| Type | Single |
| Forms | Intravenous Injection |
| Common strength | 10% / 20% |
| Common Indian brands | Fluorescein Injection 10% / 20% |
| Prescription status | Prescription (hospital use) |
What Fluorescein Sodium (intravenous) is used for
Fluorescein Sodium (intravenous) is a special diagnostic dye used during a test called Fundus Fluorescein Angiography (FFA). This test is crucial for eye doctors to get a detailed look at the blood vessels at the back of your eye, specifically to identify if they are leaking or blocked. This information is vital for diagnosing and managing several serious eye conditions that can affect your vision.
Your doctor may recommend this test using Fluorescein Sodium (intravenous) if you have conditions such as:
- Diabetic Retinopathy: A complication of diabetes that damages the blood vessels in the retina, potentially leading to vision loss. The dye helps pinpoint areas of leakage or abnormal vessel growth.
- Age-related Macular Degeneration (AMD): A common eye condition that causes blurred central vision. FFA helps distinguish between dry and wet AMD and identify abnormal blood vessel growth that can be treated.
- Retinal Vein Occlusion: A blockage in the veins that carry blood away from the retina, which can cause bleeding and swelling. The dye helps map the extent of the blockage and any associated leakage.
By using this dye, your ophthalmologist can get a clear picture of what is happening inside your eye, allowing them to make the most accurate diagnosis and plan the best course of treatment for your specific condition.
How it works
Fluorescein Sodium (intravenous) works as a special diagnostic dye. When it is injected into a vein, it travels quickly through your bloodstream and reaches the tiny blood vessels at the back of your eye, in an area called the retina. The dye itself is fluorescent, meaning it glows brightly when exposed to a specific type of light. During the Fundus Fluorescein Angiography (FFA) test, a special camera takes a series of rapid photographs as the dye flows through these retinal blood vessels.
These photographs allow your doctor to see the dye moving through the vessels in real-time. If there are any blood vessels that are leaking, the dye will seep out into the surrounding tissue, showing up as bright spots in the photographs. Similarly, if there are any blood vessels that are blocked, the dye will not be able to pass through them, appearing as dark areas. This detailed mapping helps your ophthalmologist pinpoint the exact location and extent of any leakage or blockage, which is essential for understanding your eye condition and planning appropriate treatment.
How it’s used
Fluorescein Sodium (intravenous) is not a medicine you will administer yourself. It is given as a single injection directly into a vein (intravenously) by a trained healthcare professional, typically an ophthalmologist or a nurse, in a hospital or clinic setting. This injection is given specifically during the Fundus Fluorescein Angiography (FFA) test. The entire procedure is carefully monitored by your eye specialist.
Before the injection, your doctor or nurse will explain the procedure to you. They will prepare the injection site, usually in your arm. Once the dye is injected, the special camera will begin taking pictures of the back of your eye. The entire test usually takes about 10-15 minutes, though you will need to remain still for the duration of the photography. You will be observed for a short period after the test to ensure you are feeling well.
Remember, this is a diagnostic test performed by specialists, and the medicine is never for self-use. Always follow the instructions and guidance provided by your ophthalmologist and the hospital staff.
Always follow your ophthalmologist’s exact instructions.
Brands available in India
- Fluorescein Injection 10% / 20%
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 Fluorescein Sodium (intravenous) is generally safe for diagnostic purposes, it’s important to be aware of certain precautions and potential effects. Your doctor will discuss these with you before the test.
- Temporary Skin and Urine Discoloration: After the injection, it is completely normal and harmless for your skin to take on a yellowish or orange tint. Your urine will also turn a bright yellow-orange color. This effect is temporary and usually fades within 24 to 48 hours as your body naturally clears the dye. There is no need to be alarmed by this.
- Nausea: It is quite common to feel a brief sensation of nausea, or a slight urge to vomit, immediately after the injection. This usually lasts for only about a minute or so and then passes. Please inform the staff if you feel unwell.
- Rare Allergic Reactions: Although very rare, some individuals can have a severe allergic reaction to the dye. For this reason, the Fundus Fluorescein Angiography test is always performed in a hospital or clinic where full resuscitation facilities and trained medical staff are immediately available to manage any such emergency. Your medical history will be reviewed before the test to assess any potential risks.
Always inform your doctor about any allergies you have, or any other medications you are taking, before undergoing the FFA test. Your safety is our priority, and the medical team will be closely monitoring you throughout the procedure.
Understanding Your Eye Condition and the Importance of Diagnosis
At Pristine Eye Hospitals, we understand that receiving a diagnosis for an eye condition can be concerning. Conditions like diabetic retinopathy, age-related macular degeneration (AMD), and retinal vein occlusion are significant causes of vision loss in India and worldwide. Diabetic retinopathy, for instance, is a complication of diabetes that damages the tiny blood vessels in the retina, the light-sensitive tissue at the back of your eye. If left untreated, these damaged vessels can leak fluid or blood, or even grow abnormally, leading to blurred vision, floaters, and eventually severe vision loss. Similarly, AMD affects the macula, the central part of your retina responsible for sharp, detailed vision, crucial for reading and recognizing faces. Retinal vein occlusion involves a blockage in the veins that drain blood from the retina, causing blood and fluid to leak into the retina, leading to swelling and vision impairment.
Early and accurate diagnosis is key to managing these conditions effectively and preserving your vision. This is where advanced diagnostic tools, such as the Fundus Fluorescein Angiography (FFA) test using Fluorescein Sodium (intravenous), become invaluable. By precisely mapping the blood flow and identifying areas of leakage or blockage, your ophthalmologist can tailor a treatment plan specifically for you, which might include laser therapy, injections, or other interventions. Regular eye check-ups are crucial, especially if you have underlying conditions like diabetes or a family history of eye diseases.
General Advice for Eye Health and Hygiene
While Fluorescein Sodium (intravenous) is a diagnostic tool and not a daily medication, maintaining good eye hygiene and general health practices is always important for everyone, especially those with existing eye conditions. Always wash your hands thoroughly with soap and water before touching your eyes or any eye area. This helps prevent the introduction of germs that could lead to infections. Avoid rubbing your eyes excessively, as this can irritate them and potentially worsen certain conditions.
If you are prescribed any other eye drops or ointments for your condition, it’s vital to use them exactly as directed by your ophthalmologist. Ensure the tip of the dropper or tube does not touch your eye or any other surface to keep the medicine sterile. Store all eye medicines as instructed, usually in a cool, dry place, away from direct sunlight and out of reach of children. Never use expired medication. For those with diabetes, meticulous control of blood sugar levels, blood pressure, and cholesterol is paramount in preventing the progression of diabetic retinopathy. A balanced diet rich in fruits, vegetables, and omega-3 fatty acids can also support overall eye health.
When to Seek Medical Attention
Your ophthalmologist at Pristine Eye Hospitals is your primary guide in managing your eye health. After undergoing a diagnostic test like FFA, they will discuss the results with you and outline the next steps. It is important to attend all your follow-up appointments as scheduled. However, beyond your routine visits, there are certain symptoms that warrant immediate medical attention. If you experience any sudden changes in your vision, such as a sudden decrease in clarity, new floaters (specks or cobwebs that drift across your vision), flashes of light, a sudden loss of peripheral vision, or any new eye pain or redness, do not hesitate to contact your ophthalmologist or visit the emergency department at Pristine Eye Hospitals immediately. These symptoms could indicate a serious complication that requires urgent treatment. Remember, early intervention can often make a significant difference in preserving your vision and preventing further damage. Always trust your instincts and seek professional advice if you are concerned about your eye health.
Frequently asked questions
What is Fluorescein Sodium (intravenous) used for?
Fluorescein Sodium (intravenous) is a diagnostic dye used in a special eye test called Fundus Fluorescein Angiography (FFA). This test helps your eye doctor map leaking or blocked blood vessels in your eye, which is crucial for diagnosing conditions like diabetic retinopathy, age-related macular degeneration (AMD), and retinal vein occlusion.
How does Fluorescein Sodium (intravenous) work?
After it's injected into a vein, the dye travels through the blood vessels at the back of your eye. A special camera then takes photographs as the dye flows. This shows your doctor exactly where blood vessels might be leaking or blocked, as the dye will either seep out (leaking) or fail to pass through (blocked) these areas.
What are the common brands of Fluorescein Sodium (intravenous) available in India?
In India, Fluorescein Sodium (intravenous) is commonly available under the brand names Fluorescein Injection 10% and Fluorescein Injection 20%.
How is Fluorescein Sodium (intravenous) administered?
It is given as a single injection directly into a vein (intravenously) by a qualified ophthalmologist or nurse during the Fundus Fluorescein Angiography (FFA) test in a hospital or clinic setting. It is never for self-use.
Do I need a prescription for Fluorescein Sodium (intravenous)?
Yes, Fluorescein Sodium (intravenous) is a prescription medicine and is only administered by specialists in a hospital or clinic setting. It is not available for self-medication.
What precautions should I be aware of after receiving Fluorescein Sodium (intravenous)?
It is normal for your skin and urine to turn a yellow-orange color for 24-48 hours after the injection; this is harmless. You might also feel brief nausea for about a minute. While rare, severe allergic reactions can occur, which is why the test is performed where resuscitation facilities are available. Always inform your doctor about any allergies or other medications you are taking.
References
- Fluorescein – StatPearls – NCBI Bookshelf – NIH
- Eye health – MedlinePlus (US National Library of Medicine)
- 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.