What is Aflibercept (Intraocular Route): Uses, Dosage, Side Effects and More

Aflibercept is a medication injected directly into your eye to treat serious vision problems caused by abnormal blood vessel growth. This prescription medicine works by blocking certain proteins that cause blood vessels to leak and grow where they shouldn't be in your retina.

If your doctor has recommended aflibercept injections, you're likely dealing with a condition that affects the back of your eye. While the idea of an eye injection might feel overwhelming, this treatment has helped millions of people preserve and even improve their vision when other options haven't worked.

What is Aflibercept?

Aflibercept is a lab-made protein that mimics your body's natural ability to control blood vessel growth. Think of it as a targeted medicine that goes directly to where the problem is happening in your eye.

The medication belongs to a class of drugs called VEGF inhibitors, which stands for vascular endothelial growth factor inhibitors. In simple terms, it stops the signals that tell damaged blood vessels to grow and leak fluid into your retina.

Your eye doctor will inject this clear liquid directly into the gel-like substance inside your eye called the vitreous. This allows the medicine to work right where it's needed most, rather than having to travel through your entire body to reach your eye.

What is Aflibercept Used For?

Aflibercept treats several serious eye conditions that can threaten your vision. Your doctor has likely recommended it because abnormal blood vessels in your eye are causing fluid buildup or bleeding that affects your sight.

The most common conditions treated with aflibercept include wet age-related macular degeneration, diabetic macular edema, and diabetic retinopathy. Each of these conditions involves blood vessels that either leak fluid or grow in places where they shouldn't be.

Here are the specific eye conditions that aflibercept can help treat:

• Wet age-related macular degeneration (AMD) - when abnormal blood vessels grow under your macula and leak fluid
• Diabetic macular edema - fluid buildup in your macula caused by diabetes
• Diabetic retinopathy - damage to blood vessels in your retina from diabetes
• Macular edema following retinal vein occlusion - swelling after a blood vessel in your retina becomes blocked

These conditions can cause blurred vision, dark spots, or difficulty seeing fine details. Without treatment, they can lead to permanent vision loss, which is why your doctor may have recommended starting aflibercept injections.

How Does Aflibercept Work?

Aflibercept works by blocking the growth signals that cause problematic blood vessels to form and leak in your eye. It's considered a strong and effective medication for treating vision-threatening eye conditions.

When certain proteins in your eye send signals for new blood vessels to grow, aflibercept steps in and blocks those signals. This helps stop the abnormal blood vessel growth and reduces fluid leakage that can damage your vision.

The medicine also helps existing abnormal blood vessels become more stable and less likely to leak. Over time, this can reduce swelling in your retina and help preserve or even improve your vision.

Most people start seeing improvements within a few weeks to a few months of starting treatment. However, the full benefits often take several injections to become apparent, as your eye needs time to heal and stabilize.

How Should I Take Aflibercept?

Aflibercept is given as an injection directly into your eye by your eye doctor in their office or an outpatient clinic. You cannot take this medication at home, and it's not available as eye drops or pills.

Before your injection, your doctor will numb your eye with drops to make the procedure comfortable. They'll also clean your eye and eyelid thoroughly to prevent infection.

The injection itself takes just a few seconds, though the entire appointment usually lasts about 30 minutes. Your doctor will monitor you briefly after the injection to make sure you're feeling okay.

You don't need to avoid eating or drinking before your appointment, and you can take your regular medications as usual. However, you should arrange for someone to drive you home, as your vision may be temporarily blurry after the injection.

How Long Should I Take Aflibercept For?

The length of aflibercept treatment varies depending on your specific condition and how well you respond to the medication. Most people need ongoing treatment for months or even years to maintain their vision improvements.

Initially, you'll likely receive injections every 4 to 8 weeks for the first few months. Your doctor will closely monitor your progress and may adjust the frequency based on how your eye responds.

After the initial treatment phase, some people can space out their injections to every 8 to 12 weeks. Others may need to continue with more frequent injections to maintain their vision gains.

The conditions that aflibercept treats are typically chronic, meaning they require long-term management. Stopping treatment too early often leads to the return of fluid buildup and vision problems, so it's important to follow your doctor's recommended schedule.

What Are the Side Effects of Aflibercept?

Like all medications, aflibercept can cause side effects, though most people tolerate the injections well. The most common side effects are mild and temporary, affecting your eye for a few days after the injection.

Understanding what to expect can help you feel more prepared and know when to contact your doctor. Most side effects are related to the injection process itself rather than the medication.

Here are the most common side effects you might experience:

• Eye pain or discomfort that usually improves within a day or two
• Temporary blurred vision immediately after the injection
• Feeling like something is in your eye (foreign body sensation)
• Increased tear production or watery eyes
• Mild eye redness or irritation
• Seeing small floating spots or "floaters" temporarily

These common side effects typically resolve on their own within a few days. Using preservative-free artificial tears can help with any dryness or irritation you might feel.

Less common but more serious side effects can occasionally occur. While rare, it's important to be aware of them so you can seek prompt medical attention if needed.

Contact your doctor immediately if you experience any of these rare but serious side effects:

• Severe eye pain that doesn't improve with over-the-counter pain relievers
• Sudden vision loss or significant worsening of your vision
• Flashing lights or a curtain-like shadow in your vision
• Signs of eye infection such as increasing redness, discharge, or swelling
• Severe headache with nausea or vomiting

Very rarely, aflibercept injections can cause serious complications like retinal detachment, severe eye infection, or increased eye pressure. Your doctor will monitor you carefully to catch any problems early.

Who Should Not Take Aflibercept?

Aflibercept isn't suitable for everyone, and your doctor will carefully evaluate whether it's safe for you before recommending treatment. Certain health conditions or circumstances may make this medication inappropriate or require special precautions.

You should not receive aflibercept if you have an active infection in or around your eye. Any eye infection needs to be completely cleared before starting injections to prevent serious complications.

People with known allergies to aflibercept or any of its ingredients should avoid this medication. If you've had a severe allergic reaction to similar eye injection medications, your doctor will likely recommend alternative treatments.

Your doctor will also consider these factors when deciding if aflibercept is right for you:

• Recent eye surgery or injury that hasn't fully healed
• Severe high blood pressure that isn't well controlled
• History of stroke or blood clots, especially recent ones
• Pregnancy or plans to become pregnant
• Breastfeeding
• Other serious eye conditions that might complicate treatment

If you have diabetes, heart disease, or other chronic conditions, your doctor will carefully weigh the benefits and risks. These conditions don't automatically disqualify you from treatment, but they may require closer monitoring.

Aflibercept Brand Names

Aflibercept for eye injections is available under the brand name Eylea in most countries. This is the most commonly prescribed form of aflibercept for treating eye conditions.

Your prescription and insurance paperwork will likely refer to it as Eylea, though the active ingredient is aflibercept. Some insurance plans may have specific requirements or prior authorization processes for this medication.

There's also a newer formulation called Eylea HD, which contains a higher concentration of aflibercept. This allows for less frequent injections in some cases, but it's not appropriate for all patients or conditions.

Aflibercept Alternatives

Several other medications can treat similar eye conditions if aflibercept isn't suitable for you or doesn't provide adequate results. Your doctor might consider these alternatives based on your specific situation and medical history.

Other VEGF inhibitors work similarly to aflibercept and may be equally effective for your condition. These include ranibizumab (Lucentis) and bevacizumab (Avastin), which are also given as eye injections.

Here are the main alternatives your doctor might consider:

• Ranibizumab (Lucentis) - another VEGF inhibitor that's FDA-approved for similar conditions
• Bevacizumab (Avastin) - originally a cancer drug that's used off-label for eye conditions
• Brolucizumab (Beovu) - a newer VEGF inhibitor that may require fewer injections
• Faricimab (Vabysmo) - targets multiple pathways and may extend time between injections

In some cases, your doctor might recommend laser therapy, steroid injections, or surgical procedures as alternatives or supplements to VEGF inhibitor injections. The best choice depends on your specific condition, how advanced it is, and how you've responded to previous treatments.

Is Aflibercept Better Than Ranibizumab (Lucentis)?

Both aflibercept and ranibizumab are highly effective medications for treating serious eye conditions, and research shows they work similarly well for most people. The choice between them often comes down to individual factors rather than one being definitively better than the other.

Studies have found that both medications can significantly improve vision and prevent further vision loss in people with conditions like wet macular degeneration and diabetic eye disease. Most people respond well to either medication.

The main difference is that aflibercept may allow for slightly longer intervals between injections in some people. While ranibizumab is typically given every 4 weeks initially, aflibercept can sometimes be extended to every 8 weeks after the initial treatment phase.

Your doctor will choose the best medication for you based on several factors including your specific condition, insurance coverage, and how you respond to treatment. Some people may switch between medications if their initial choice doesn't provide optimal results.