What is Infliximab-abda: Uses, Dosage, Side Effects and More

Infliximab-abda is a biosimilar medication that helps treat autoimmune conditions by calming down your overactive immune system. This injectable medicine works by blocking a specific protein called TNF-alpha that causes inflammation in your body. It's designed to be nearly identical to the original infliximab medication but typically costs less while providing the same therapeutic benefits.

What is Infliximab-abda?

Infliximab-abda is a biosimilar version of the original infliximab medication. Think of it as a highly similar copy of the original drug that has been rigorously tested to ensure it works just as effectively. The "abda" part simply refers to the specific manufacturer's version of this biosimilar.

This medication belongs to a class of drugs called TNF blockers or biologics. Your body receives it through an intravenous infusion, which means it's given directly into your bloodstream through a small tube in your arm. The process typically takes about 2-3 hours in a medical facility where healthcare professionals can monitor you.

Unlike traditional medications that you might take as pills, infliximab-abda is made from living cells. This makes it a more complex medication that requires special handling and administration by trained medical staff.

What is Infliximab-abda Used For?

Infliximab-abda treats several autoimmune conditions where your immune system mistakenly attacks healthy parts of your body. Your doctor might prescribe it when other treatments haven't provided enough relief from your symptoms.

The most common conditions it helps manage include rheumatoid arthritis, where it reduces joint pain and swelling that can severely impact your daily activities. Many people find significant improvement in their ability to move and perform routine tasks after starting treatment.

It's also highly effective for inflammatory bowel diseases like Crohn's disease and ulcerative colitis. If you're dealing with persistent digestive symptoms, severe abdominal pain, or frequent bathroom trips, this medication can help heal your intestinal lining and reduce inflammation.

Other conditions that may benefit from infliximab-abda include psoriasis, psoriatic arthritis, and ankylosing spondylitis. Your doctor will determine if this medication is right for your specific situation based on your symptoms and how you've responded to other treatments.

How Does Infliximab-abda Work?

Infliximab-abda works by targeting and blocking TNF-alpha, a protein that plays a key role in causing inflammation throughout your body. When you have an autoimmune condition, your body produces too much of this protein, leading to the painful symptoms you experience.

This medication is considered a strong, targeted treatment that can provide significant relief when other medications haven't worked well enough. By blocking TNF-alpha, it helps break the cycle of inflammation that's causing damage to your joints, digestive system, or skin.

The effects aren't immediate, and you might not notice improvements for several weeks or even months after starting treatment. Your body needs time to respond to the medication and for the inflammation to calm down. Most people begin to feel better after their second or third infusion.

Because it's a powerful medication that affects your immune system, it requires careful monitoring by your healthcare team. They'll regularly check your blood work and watch for any signs that your immune system might be too suppressed.

How Should I Take Infliximab-abda?

You'll receive infliximab-abda as an intravenous infusion at a medical facility, hospital, or specialized infusion center. The medication comes as a powder that gets mixed with sterile water and then slowly dripped into your bloodstream through an IV line.

Before each infusion, you'll typically receive premedication to help prevent allergic reactions. This usually includes antihistamines like Benadryl and sometimes acetaminophen or corticosteroids. These medications help your body tolerate the infusion better and reduce the risk of side effects.

The infusion itself takes about 2-3 hours, during which you'll be monitored closely by medical staff. You can usually read, use your phone, or rest during this time. Most people find the process relatively comfortable, though some experience mild fatigue afterward.

You don't need to avoid food before your infusion, and staying well-hydrated can actually help you feel better during the treatment. Some people find it helpful to bring snacks or a light meal to have during the longer infusion process.

How Long Should I Take Infliximab-abda For?

The length of treatment with infliximab-abda varies significantly depending on your condition and how well you respond to the medication. Many people continue treatment for several years to maintain their symptom relief and prevent disease progression.

Your doctor will typically start with a loading schedule, giving you infusions at weeks 0, 2, and 6. After that, you'll usually receive infusions every 8 weeks. This schedule allows the medication to build up in your system and maintain consistent levels.

Some people may need the medication indefinitely to keep their symptoms under control. Others might be able to space out treatments or eventually stop if their condition goes into remission. Your healthcare team will regularly assess your progress and adjust your treatment plan accordingly.

Never stop taking infliximab-abda suddenly without discussing it with your doctor first. Stopping abruptly can lead to a flare-up of your symptoms and potentially make your condition harder to control when you restart treatment.

What Are the Side Effects of Infliximab-abda?

Like all medications, infliximab-abda can cause side effects, though many people tolerate it well. Understanding what to expect can help you feel more prepared and know when to contact your healthcare team.

The most common side effects you might experience are generally mild and manageable with proper care:

• Headache and fatigue, especially in the first day or two after your infusion
• Upper respiratory infections like colds or sinus infections
• Injection site reactions if you develop redness or swelling near the IV site
• Nausea or stomach upset, which usually improves with time
• Muscle or joint aches that typically resolve within a few days

These common side effects often improve as your body adjusts to the medication over the first few infusions.

More serious side effects require immediate medical attention, though they're less common. These include signs of serious infection like persistent fever, severe fatigue, or unusual symptoms that don't improve. Because the medication affects your immune system, your body may have a harder time fighting off infections.

Some people may experience infusion reactions during or shortly after receiving the medication. These can include fever, chills, chest tightness, or skin reactions. Your medical team is well-prepared to handle these situations and will monitor you closely during each infusion.

Rare but serious side effects can include liver problems, heart issues, or blood disorders. Your doctor will order regular blood tests to monitor for these potential complications and catch any problems early.

Who Should Not Take Infliximab-abda?

Certain people should avoid infliximab-abda due to increased risks of serious complications. Your doctor will carefully review your medical history before recommending this treatment.

You shouldn't take this medication if you have an active infection, especially serious infections like tuberculosis or hepatitis B. The medication can make these infections worse and harder to treat. Your doctor will test you for these conditions before starting treatment.

People with certain heart conditions, particularly moderate to severe heart failure, should typically avoid this medication. Infliximab-abda can potentially worsen heart problems in some individuals.

If you have a history of certain cancers, especially lymphoma or skin cancer, your doctor will need to weigh the benefits and risks very carefully. The medication can potentially increase your risk of developing certain types of cancer.

Pregnant women should generally avoid this medication unless the benefits clearly outweigh the risks. If you're planning to become pregnant or are already pregnant, discuss this with your doctor to explore safer alternatives.

Infliximab-abda Brand Names

Infliximab-abda is marketed under the brand name Renflexis in the United States. This is the specific biosimilar version manufactured by Samsung Bioepis and distributed by Merck.

The original infliximab medication is sold under the brand name Remicade. While Renflexis is designed to work just as effectively as Remicade, it's typically available at a lower cost.

Your pharmacy or insurance company might use either the generic name (infliximab-abda) or the brand name (Renflexis) when discussing your medication. Both terms refer to the same medication.

Infliximab-abda Alternatives

Several alternative medications work similarly to infliximab-abda if this treatment isn't suitable for you. Your doctor can help you explore these options based on your specific condition and medical history.

Other TNF blockers include adalimumab (Humira), etanercept (Enbrel), and certolizumab (Cimzia). These medications work by blocking the same TNF-alpha protein but may be given as injections under the skin rather than through an IV.

Non-TNF biologic medications like rituximab, abatacept, or tocilizumab target different parts of the immune system. These might be options if TNF blockers don't work well for you or cause too many side effects.

Traditional disease-modifying drugs like methotrexate, sulfasalazine, or hydroxychloroquine might also be considered, either alone or in combination with biologics. Your doctor will help determine the best treatment approach for your situation.

Is Infliximab-abda Better Than Remicade?

Infliximab-abda (Renflexis) is designed to be just as effective as the original Remicade, with studies showing very similar results in treating autoimmune conditions. The main difference is typically cost, with biosimilars like Renflexis often being more affordable.

Both medications contain the same active ingredient and work in the same way to block TNF-alpha. Clinical studies have shown that people switching from Remicade to Renflexis maintain the same level of symptom control.

Your insurance coverage might influence which medication you receive, as many insurance plans prefer the lower-cost biosimilar options. However, if you're doing well on Remicade, there's no medical reason you must switch to the biosimilar.

Some people worry about switching medications, but the FDA has determined that biosimilars like infliximab-abda are safe and effective alternatives to the original medications.