If you live with an autoimmune condition like rheumatoid arthritis, psoriatic arthritis, or ankylosing spondylitis, a biologic may have changed your life. Pain eased, swelling went down, and you got back to doing what you love.
So it can be scary when that medication slowly starts to work less well.
One possible reason is that your body has started making antibodies against your biologic. As a Chicago rheumatologist team, we see this regularly. The reassuring part is that it can often be prevented, and when it happens, you still have options.
What Are Biologic Medications?
Biologics are a class of medications made from living cells, either human or animal. Over the last 25 to 30 years, they have transformed care for:
- Autoimmune diseases such as rheumatoid arthritis and lupus
- Cancer
- Allergies and asthma
- Other inflammatory conditions
Why Biologics Work So Well
Older medications often affected the immune system broadly. Biologics are different. They target specific parts of the immune system that drive inflammation.
Because they are more targeted, they tend to be more effective for many patients, which makes them a cornerstone of modern autoimmune disease treatment.
Why Do Biologics Sometimes Stop Working?
Not everyone loses response to a biologic. But it does happen sometimes, and there are two main reasons.
1. Your Disease Uses More Than One Pathway
Autoimmune conditions can involve several inflammation pathways at once. A biologic may block one pathway very well. Over time, another pathway can become more active, and symptoms return.
2. Your Body Develops Antibodies to the Medication
Because biologics are made from living cells, your immune system may sometimes see the medication as “foreign.” It can then create antibodies against it.
What Happens When You Develop Antibodies?
Many people expect an immediate allergic reaction. That is usually not what happens.
More often, the process looks like this:
- Gradual loss of effectiveness: The medication slowly works less well. Your joint pain, stiffness, or fatigue creep back.
- Possible allergic reactions later: Over time, some people develop reactions to the medication. In some cases, this can happen more quickly.
Antibody development is more common with certain biologics than others. Infliximab (Remicade), for example, is one of the medications where this is classically seen.
What If You React to More Than One Biologic?
In most cases, if you develop antibodies to one biologic, you can switch to another and do well.
Occasionally, a patient may have trouble with several medications in the same class. For example, someone might develop antibodies to infliximab and then struggle to tolerate other TNF blockers as well. This is uncommon, and it can be frustrating.
The good news is that there are other classes of biologics and other medications available for many autoimmune conditions. Running out of options in one class does not mean running out of options altogether.
Do Doctors Still Test for Antibodies?
In the past, rheumatologists checked antibody levels more often when a biologic seemed to be losing its effect. That was largely because there were fewer treatment options. Doctors didn’t want to switch unless they had to.
Today, the approach has changed. With many more biologics available, the common practice when a treatment starts losing effectiveness is often to switch to another biologic agent rather than test for antibodies first. Your rheumatology specialist will decide what makes sense for you.
How to Lower Your Risk of Developing Antibodies
You can’t fully control how your immune system responds, but you can reduce the risk.
Stay Consistent With Your Treatment
Being on and off your medication can increase the chance of antibody formation. Try to:
- Keep a regular, scheduled routine
- Avoid skipping or delaying doses without talking to your doctor
- Plan ahead for travel, insurance changes, or refills
Keep a Steady Level of Medication
Your body does best with a steady level of medication in the blood. Large spikes followed by drops close to zero can make antibody development more likely. Consistent dosing helps keep things stable.
Ask About Adding Methotrexate or a Similar Medication
Methotrexate, or a similar medication, is often used alongside biologics. Besides helping control inflammation, it can help reduce the chance of your body forming antibodies to the biologic.
Never start, stop, or change medications on your own. Always discuss changes with your rheumatologist.
Signs Your Biologic May Be Losing Effectiveness
Contact your rheumatologist if you notice:
- Joint pain or swelling returning between doses
- Increased morning stiffness
- More fatigue or flares than usual
- Injection-site or infusion reactions, such as rash, itching, or shortness of breath
Seek emergency care right away for severe symptoms like trouble breathing or swelling of the face or throat.
Comprehensive Arthritis Care in Chicago
At Chicago Arthritis and Regenerative Medicine, our goal is to keep your condition under control for the long term. Our arthritis care includes:
- Autoimmune disease treatment with biologics and other targeted therapies
- Monitoring and adjusting treatment when medications lose effectiveness
- Osteoarthritis treatment and joint pain relief options
- Regenerative medicine in Chicago, including PRP therapy for appropriate joint and tissue conditions
- Chronic pain management tailored to your goals
Regenerative treatments are not a replacement for biologics in autoimmune disease, but they may help with specific joint problems, such as osteoarthritis, that many patients face alongside their autoimmune condition.
Conclusion: You Have Options
Losing response to a biologic that once worked well is frustrating. But it is not the end of the road.
Staying consistent with treatment, keeping steady medication levels, and using medications like methotrexate can help lower your risk. And if a biologic does stop working, there are many other treatment options to keep your condition under control.
Looking for expert arthritis treatment in Chicago? Visit ChicagoArthritis.com to learn more or schedule a consultation with our rheumatology team.
This article is for educational purposes and is not a substitute for personalized medical advice.
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