Can't find Byooviz? Here are FDA-approved alternatives including Cimerli, Eylea, Avastin, and Vabysmo to keep your eye treatment on track.
If you've been prescribed Byooviz (Ranibizumab-nuna) and can't find it — or your doctor's office is having trouble keeping it in stock — you need to know your options. Skipping an anti-VEGF injection when you have wet AMD, retinal vein occlusion, or myopic choroidal neovascularization can lead to permanent vision loss.
The good news: there are several effective alternatives to Byooviz. All of them work by targeting the same underlying problem — abnormal blood vessel growth in the retina — though they do it in slightly different ways. Your doctor can help you decide which one is right for you.
Byooviz is an FDA-approved biosimilar to Lucentis (Ranibizumab). It belongs to a class of drugs called anti-VEGF agents — medications that block vascular endothelial growth factor (VEGF), a protein your body produces that triggers the growth of new blood vessels.
In healthy eyes, VEGF plays a useful role. But in conditions like wet AMD, the body produces too much VEGF in the retina, causing abnormal blood vessels to grow. These fragile vessels leak fluid and blood, damaging the macula (the part of the retina responsible for central vision) and causing rapid vision loss.
Byooviz works by binding to VEGF-A and blocking it from activating its receptors. This slows or stops abnormal vessel growth and reduces fluid leakage, helping to preserve your remaining vision.
For more details, read our complete guide on how Byooviz works.
Byooviz is given as a 0.5 mg intravitreal injection (a shot directly into the eye) approximately once a month in a doctor's office. It's FDA-approved for three conditions:
Cimerli is the closest alternative to Byooviz because it's also a biosimilar to Lucentis. It was approved by the FDA in August 2022 and is also designated as interchangeable with the reference product.
Key differences from Byooviz:
If you've been doing well on Byooviz and simply can't find it, Cimerli is the most seamless switch since it contains the same active ingredient (ranibizumab).
"Can we switch to Cimerli if Byooviz isn't available? Are there any differences I should know about?"
Lucentis is the original (reference) product that Byooviz was designed to match. It's been on the market since 2006 and has an extensive safety and efficacy track record.
Key facts:
Switching from Byooviz to Lucentis is essentially using the same drug — the clinical outcomes should be identical. However, the cost difference is substantial. If you have insurance, make sure your plan covers Lucentis, and ask about any cost-sharing differences.
Eylea is the most widely used anti-VEGF injection in the United States, holding approximately 43% of the retinal injection market. It works differently from Byooviz — instead of targeting just VEGF-A, Aflibercept also binds to VEGF-B and placental growth factor (PlGF).
Key facts:
Eylea is a solid choice if Byooviz isn't available, especially for patients who'd benefit from potentially longer intervals between injections. Your doctor will determine the right dosing schedule.
Avastin is technically an anti-cancer drug that's used off-label for retinal conditions. Despite not being FDA-approved for eye use, it's one of the most commonly administered anti-VEGF treatments in ophthalmology — largely because it's dramatically cheaper.
Key facts:
While Avastin is effective for many patients, it does require compounding, which introduces a small additional risk. Discuss this option with your doctor, particularly if cost is a major concern.
Vabysmo is a newer anti-VEGF option that works differently from all the others on this list. It's a bispecific antibody that targets both VEGF-A and a second protein called angiopoietin-2 (Ang-2), which also contributes to blood vessel instability and inflammation in the retina.
Key facts:
Vabysmo may be a particularly good alternative for patients who want fewer injections per year. However, it's one of the newer options, so your doctor may want to discuss its track record compared to more established treatments.
The best alternative depends on your specific situation:
Always discuss alternatives with your retinal specialist. They know your clinical history and can recommend the option most likely to protect your vision.
Not being able to find Byooviz is stressful, but it's not a dead end. There are multiple effective anti-VEGF alternatives that can keep your treatment on track and protect your vision. The most important thing is to not skip your injection — talk to your doctor right away about switching if Byooviz isn't available.
You can also use Medfinder to search for Byooviz availability near you, or read our guide on how to find Byooviz in stock. For information about side effects, check out our article on Byooviz side effects.
You focus on staying healthy. We'll handle the rest.
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